diff --git a/language/ca_ES/admin.lang.php b/language/ca_ES/admin.lang.php
index 6e0bb700d..ed31fdfee 100644
--- a/language/ca_ES/admin.lang.php
+++ b/language/ca_ES/admin.lang.php
@@ -1381,4 +1381,30 @@ $lang['You have unsaved changes'] = 'Teniu canvis sense desar';
 $lang['between %d and %d'] = 'entre %d i %d';
 $lang['image(s) contains unsaved changes'] = 'Una o més imatges contenen canvis sense desar';
 $lang['level of confidentiality'] = 'nivell de confidencialitat';
-$lang['was succesfully deleted'] = 's\'ha suprimit amb èxit';
\ No newline at end of file
+$lang['was succesfully deleted'] = 's\'ha suprimit amb èxit';
+$lang['%s is the new main user'] = '%s és el nou usuari principal';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'S\'ha enviat un enllaç d\'activació vàlid durant 1 hora a "%s". Si l\'usuari no rep l\'enllaç, podeu generar-ne un de nou i copiar-lo editant l\'usuari i gestionant la seva contrasenya.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'S\'ha creat un enllaç d\'activació vàlid durant 1 hora, però no s\'ha pogut enviar. Podeu copiar l\'enllaç següent i enviar-lo a l\'usuari.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'No es pot enviar un correu electrònic a aquest usuari perquè no té cap adreça electrònica';
+$lang['Changing the main user'] = 'Canvi d\'usuari principal';
+$lang['Copied link'] = 'Enllaç copiat';
+$lang['Copy password'] = 'Copia la contrasenya';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Copieu l\'enllaç següent i envieu-lo a l\'usuari perquè pugui establir-se la contrasenya.';
+$lang['Copy the password link'] = 'Copia l\'enllaç de la contrasenya';
+$lang['Main user'] = 'Usuari principal';
+$lang['Password copied'] = 'Contrasenya copiada';
+$lang['Please complete all fields'] = 'Si us plau, ompliu tots els camps';
+$lang['Resend password link'] = 'Torna a enviar l\'enllaç de la contrasenya';
+$lang['Set as main user'] = 'Estableix com a usuari principal';
+$lang['The passwords do not match'] = 'Les contrasenyes no coincideixen';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Aquest usuari s\'ha de definir com a administrador web abans que es pugui actualitzar a l\'usuari principal';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Per confirmar, torneu a escriure la paraula "%s" a continuació';
+$lang['Username successfully modified'] = 'El nom d\'usuari s\'ha modificat correctament';
+$lang['Yes, let\'s proceed'] = 'Sí, endavant';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Esteu a punt d\'establir %s com a usuari principal en lloc de %s. Voleu continuar?';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'No teniu autorització per canviar l\'usuari principal, demaneu-ho al vostre administrador web';
+$lang['You can now change the main user from %s to %s.'] = 'Ja podeu canviar l\'usuari principal de %s a %s.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'No podeu copiar la contrasenya si la connexió a aquest lloc no és segura.';
+$lang['Ok, got it!'] = 'D\'acord, entesos!';
+$lang['Read the release note'] = 'Llegiu les notes de la versió';
+$lang['What\'s new in version %s'] = 'Quines novetats hi ha a la versió %s?';
\ No newline at end of file
diff --git a/language/ca_ES/common.lang.php b/language/ca_ES/common.lang.php
index ae1ad8aa3..0f7cd18ee 100644
--- a/language/ca_ES/common.lang.php
+++ b/language/ca_ES/common.lang.php
@@ -449,4 +449,7 @@ $lang['Pages'] = 'Pàgines';
 $lang['The PDF you requested is too large to display on this page.'] = 'El PDF que heu sol·licitat és massa gran per mostrar-lo en aquesta pàgina.';
 $lang['Click here to display it'] = 'Feu clic aquí per mostrar-lo';
 $lang['Custom dates'] = 'Dates personalitzades';
-$lang['last 12 months'] = 'Els darrers 12 mesos';
\ No newline at end of file
+$lang['last 12 months'] = 'Els darrers 12 mesos';
+$lang['There are no authors available for the photos currently filtered'] = 'No hi ha autors disponibles per a les fotos filtrades actualment';
+$lang['There are no creation dates available for the photos currently filtered'] = 'No hi ha dates de creació disponibles per a les fotos filtrades actualment';
+$lang['There are no tags available for the photos currently filtered'] = 'No hi ha etiquetes disponibles per a les fotos filtrades actualment';
\ No newline at end of file
diff --git a/language/ca_ES/whats_new_15.lang.php b/language/ca_ES/whats_new_15.lang.php
new file mode 100644
index 000000000..6094b7792
--- /dev/null
+++ b/language/ca_ES/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Una nova interfície per a la gestió d\'usuaris';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Característiques totalment noves: registres d\'activitats i lector de PDF';
+$lang['Enhanced interface for batch manager and album selector'] = 'Interfície millorada per al gestor per lots i el selector d\'àlbums';
+$lang['Even more filters for the gallery search engine'] = 'Encara més filtres per al motor de cerca de la galeria';
\ No newline at end of file
diff --git a/language/cs_CZ/admin.lang.php b/language/cs_CZ/admin.lang.php
index bbacb1516..590c34937 100644
--- a/language/cs_CZ/admin.lang.php
+++ b/language/cs_CZ/admin.lang.php
@@ -1373,4 +1373,30 @@ $lang['Save'] = 'Uložit';
 $lang['Select or create an album'] = 'Vyberte nebo vytvořte nové album';
 $lang['System Activities'] = 'Systémové aktivity';
 $lang['Who can see ?'] = 'Kdo si může zobrazit?';
-$lang['You have unsaved changes'] = 'Máte neuložené změny';
\ No newline at end of file
+$lang['You have unsaved changes'] = 'Máte neuložené změny';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Nemůžete kopírovat heslo pokud není přípojení k tomuto webu bezpečné.';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Nemáte oprávnění měnit hlavního uživatele, zeptejte se prosím svého webmastera';
+$lang['You can now change the main user from %s to %s.'] = 'Nyní můžete změnit hlavního uživatele z %s na %s.';
+$lang['%s is the new main user'] = '%s je nový hlavní uživatel';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Na adresu "%s" byl odeslán aktivační odkaz platný 1 hodinu. Pokud uživatel odkaz neobdrží, můžete vytvořit a zkopírovat nový, a to úpravou uživatele a správou jeho hesla.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Aktivační odkaz platný 1 hodinu byl vytvořen, ale nemohl být odeslán. Nyní můžete níže uvedený odkaz zkopírovat a odeslat uživateli.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Tomuto uživateli nelze odeslat e-mail, protože žádný nemá nastaven.';
+$lang['Changing the main user'] = 'Změna hlavního uživatele';
+$lang['Copied link'] = 'Kopírovaný odkaz';
+$lang['Copy password'] = 'Zkopírovat heslo';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Zkopírujte odkaz níže a pošlete ho uživateli, aby mohlo být nastaveno heslo.';
+$lang['Copy the password link'] = 'Odkaz na zkopírování hesla';
+$lang['Main user'] = 'Hlavní uživatel';
+$lang['Password copied'] = 'Heslo zkopírováno';
+$lang['Please complete all fields'] = 'Vyplňte všechna pole, prosím';
+$lang['Resend password link'] = 'Odkaz na znovu zaslání hesla';
+$lang['Set as main user'] = 'Nastavit jako hlavní uživatel';
+$lang['The passwords do not match'] = 'Heslo se neshoduje';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Tento uživatel musí být nejprve definován jako webmaster, než může být změněn na hlavního uživatele.';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Pro jistotu prosím níže přepište slovo “%s”';
+$lang['Username successfully modified'] = 'Jméno uživatele úspěšně upraveno';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Nastavujete %s jako hlavního uživatele místo %s, přejete si pokračovat?';
+$lang['Yes, let\'s proceed'] = 'Ano, pokračujme.';
+$lang['Ok, got it!'] = 'Hotovo!';
+$lang['Read the release note'] = 'Zobrazit poznámky o verzi';
+$lang['What\'s new in version %s'] = 'Novinky ve verzi %s?';
\ No newline at end of file
diff --git a/language/cs_CZ/whats_new_15.lang.php b/language/cs_CZ/whats_new_15.lang.php
new file mode 100644
index 000000000..0582243c1
--- /dev/null
+++ b/language/cs_CZ/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Nové rozhraní pro správu uživatelů';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Nové funkce : Záznamy aktivit a čtečka PDF';
+$lang['Enhanced interface for batch manager and album selector'] = 'Vylepšené rozhraní pro dávkového manažera a výběr alba';
+$lang['Even more filters for the gallery search engine'] = 'Ještě více filtrů pro vyhledávání v galerii';
\ No newline at end of file
diff --git a/language/da_DK/admin.lang.php b/language/da_DK/admin.lang.php
index 7d1dc5a06..476812b51 100644
--- a/language/da_DK/admin.lang.php
+++ b/language/da_DK/admin.lang.php
@@ -1374,4 +1374,30 @@ $lang['Save'] = 'Gem';
 $lang['Select or create an album'] = 'Vælg eller opret et album';
 $lang['System Activities'] = 'Systemaktiviteter';
 $lang['Who can see ?'] = 'Hvem kan se det?';
-$lang['You have unsaved changes'] = 'Du har ændringer som ikke er gemt';
\ No newline at end of file
+$lang['You have unsaved changes'] = 'Du har ændringer som ikke er gemt';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Du er ikke autoriseret til at ændre den primære bruger, kontakt din webmaster';
+$lang['You can now change the main user from %s to %s.'] = 'Du kan nu ændre den primære bruger fra %s til %s.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Du kan ikke kopiere adgangskoden, hvis forbindelsen til webstedet ikke er sikker.';
+$lang['%s is the new main user'] = '%s er den nye primær bruger';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Et aktiveringslink, gyldigt i en time, er sendt til "%s". Hvis brugeren ikke modtager linket, kan du generere og sende et nyt, ved at redigere brugeren og håndtere vedkommendes adgangskode.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Et aktiveringslink, gyldigt i en time, blev oprettet, men kunne ikke sendes. Du kan nu kopiere linket nedenfor og sende det til brugeren.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Kan ikke sende en mail til denne bruger, da vedkommende ikke har en mailadresse';
+$lang['Changing the main user'] = 'Ændring af primær bruger';
+$lang['Copied link'] = 'Link kopieret';
+$lang['Copy password'] = 'Kopier adgangskode';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Kopier linket herunder og send det til brugeren, så adgangskoden kan opsættes.';
+$lang['Copy the password link'] = 'Kopier adgangskodelinket';
+$lang['Main user'] = 'Primær bruger';
+$lang['Password copied'] = 'Adgangskode kopieret';
+$lang['Please complete all fields'] = 'Udfyld alle felter';
+$lang['Resend password link'] = 'Genfremsend adgangskodelink';
+$lang['Set as main user'] = 'Opsæt som primær bruger';
+$lang['The passwords do not match'] = 'Adgangskoderne stemmer ikke overens';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Brugeren kan først opsættes som webmasteren, før den kan opgraderes til den primære bruger';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Bekræft ved at gentage ordet "%s" nedenfor';
+$lang['Username successfully modified'] = 'Brugernavn blev ændret';
+$lang['Yes, let\'s proceed'] = 'Ja, fortsæt';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Du er ved at opsætte %s som primær bruger i stedet for %s, ønsker du at fortsætte?';
+$lang['Ok, got it!'] = 'Ok, forstået!';
+$lang['Read the release note'] = 'Læs udgivelsesbemærkningerne';
+$lang['What\'s new in version %s'] = 'Hvad er nyt i version %s?';
\ No newline at end of file
diff --git a/language/da_DK/common.lang.php b/language/da_DK/common.lang.php
index 87714a838..1725c9d28 100644
--- a/language/da_DK/common.lang.php
+++ b/language/da_DK/common.lang.php
@@ -452,4 +452,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Kun de første %d
 $lang['Pages'] = 'Sider';
 $lang['The PDF you requested is too large to display on this page.'] = 'PDF-filen som du bad om er for stor til at vise på denne side.';
 $lang['Custom dates'] = 'Skræddersyede datoer';
-$lang['last 12 months'] = 'Seneste 12 måneder';
\ No newline at end of file
+$lang['last 12 months'] = 'Seneste 12 måneder';
+$lang['There are no authors available for the photos currently filtered'] = 'Der er ingen tilgængelige forfattere for de pt. filtrerede fotografier';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Der er ingen tilgængelige oprettelsesdatoer for de pt. filtrerede fotografier';
+$lang['There are no tags available for the photos currently filtered'] = 'Der er ingen tilgængelige tags for de pt. filtrerede fotografier';
\ No newline at end of file
diff --git a/language/da_DK/whats_new_15.lang.php b/language/da_DK/whats_new_15.lang.php
new file mode 100644
index 000000000..d0f0d3c5b
--- /dev/null
+++ b/language/da_DK/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'En ny grænseflade til brugerhåndtering';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Helt nye funktioner: Aktivitetslogninger og PDF-viser';
+$lang['Enhanced interface for batch manager and album selector'] = 'Forbedret grænseflade til batchhåndtering og albumudvælgelse';
+$lang['Even more filters for the gallery search engine'] = 'Endnu flere filtre til galleriets søgemaskine';
\ No newline at end of file
diff --git a/language/de_DE/admin.lang.php b/language/de_DE/admin.lang.php
index 42bf18c86..9b9ddcedf 100644
--- a/language/de_DE/admin.lang.php
+++ b/language/de_DE/admin.lang.php
@@ -1375,4 +1375,30 @@ $lang['An error has occured'] = 'Es ist ein Fehler aufgetreten';
 $lang['Auto-update'] = 'Auto-Update';
 $lang['Activate create mode to create and select an album'] = 'Aktivieren Sie den Erstellungsmodus zum Erstellen und Auswählen eines Albums';
 $lang['Add a sub-album to “%s”'] = 'Ein Unteralbum zu „%s“ hinzufügen';
-$lang['Added on %s'] = 'Hinzugefügt am %s';
\ No newline at end of file
+$lang['Added on %s'] = 'Hinzugefügt am %s';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Sie sind nicht berechtigt, den Hauptbenutzer zu ändern, fragen Sie bitte Ihren Webmaster';
+$lang['You can now change the main user from %s to %s.'] = 'Sie können jetzt den Hauptbenutzer von %s auf %s ändern.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Sie können das Passwort nicht kopieren, wenn die Verbindung zu dieser Website nicht sicher ist.';
+$lang['Username successfully modified'] = 'Benutzername erfolgreich geändert';
+$lang['Yes, let\'s proceed'] = 'Ja, weiter geht\'s';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Sie sind im Begriff, %s als Hauptbenutzer anstelle von %s festzulegen, möchten Sie fortfahren?';
+$lang['Set as main user'] = 'Als Hauptbenutzer festlegen';
+$lang['The passwords do not match'] = 'Die Kennwörter stimmen nicht überein';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Dieser Benutzer muss zunächst als Webmaster definiert werden, bevor er zum Hauptbenutzer hochgestuft werden kann';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Um sicherzugehen, schreiben Sie bitte das Wort „%s“ wie folgt um';
+$lang['Main user'] = 'Hauptbenutzer';
+$lang['Password copied'] = 'Passwort kopiert';
+$lang['Please complete all fields'] = 'Bitte füllen Sie alle Felder aus';
+$lang['Resend password link'] = 'Link Passwort erneut senden';
+$lang['Copied link'] = 'Link kopieren';
+$lang['Copy password'] = 'Passwort kopieren';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Kopieren Sie den unten stehenden Link und senden Sie ihn an den Benutzer, damit das Passwort festgelegt werden kann.';
+$lang['Copy the password link'] = 'Kopieren Sie den Passwort-Link';
+$lang['%s is the new main user'] = '%s ist der neue Hauptbenutzer';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Ein für 1 Stunde gültiger Aktivierungslink wurde an „%s“ gesendet. Wenn der Benutzer den Link nicht erhält, können Sie einen neuen Link erstellen und kopieren, indem Sie den Benutzer bearbeiten und sein Passwort verwalten.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Ein für 1 Stunde gültiger Aktivierungslink wurde erstellt, konnte aber nicht gesendet werden. Sie können nun den unten stehenden Link kopieren und an den Benutzer senden.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Kann keine E-Mail an diesen Benutzer senden, da er keine E-Mail-Adresse hat';
+$lang['Changing the main user'] = 'Ändern des Hauptbenutzers';
+$lang['Ok, got it!'] = 'Okay, verstanden!';
+$lang['Read the release note'] = 'Lesen Sie die Freigabemitteilung';
+$lang['What\'s new in version %s'] = 'Was ist neu in der Version %s?';
\ No newline at end of file
diff --git a/language/de_DE/common.lang.php b/language/de_DE/common.lang.php
index 4a229de80..703e0d470 100644
--- a/language/de_DE/common.lang.php
+++ b/language/de_DE/common.lang.php
@@ -450,4 +450,7 @@ $lang['The PDF you requested is too large to display on this page.'] = 'Die von
 $lang['Album already selected'] = 'Album bereits ausgewählt';
 $lang['Click here to display it'] = 'Klicken Sie hier, um es anzuzeigen';
 $lang['Custom dates'] = 'Benutzerdefinierte Daten';
-$lang['last 12 months'] = 'Letzte 12 Monate';
\ No newline at end of file
+$lang['last 12 months'] = 'Letzte 12 Monate';
+$lang['There are no authors available for the photos currently filtered'] = 'Derzeit sind keine Autoren für die gefilterten Fotos verfügbar';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Es sind keine Erstellungsdaten für die derzeit gefilterten Fotos verfügbar';
+$lang['There are no tags available for the photos currently filtered'] = 'Es sind keine Tags für die derzeit gefilterten Fotos verfügbar';
\ No newline at end of file
diff --git a/language/de_DE/whats_new_15.lang.php b/language/de_DE/whats_new_15.lang.php
new file mode 100644
index 000000000..2458614aa
--- /dev/null
+++ b/language/de_DE/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Eine neue Schnittstelle für die Benutzerverwaltung';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Brandneue Funktionen: Aktivitätenprotokolle und PDF-Reader';
+$lang['Enhanced interface for batch manager and album selector'] = 'Verbesserte Benutzeroberfläche für Batch Manager und Albumselektor';
+$lang['Even more filters for the gallery search engine'] = 'Noch mehr Filter für die Galeriesuchmaschine';
\ No newline at end of file
diff --git a/language/el_GR/admin.lang.php b/language/el_GR/admin.lang.php
index e3392ca7f..23c0ff531 100644
--- a/language/el_GR/admin.lang.php
+++ b/language/el_GR/admin.lang.php
@@ -1370,4 +1370,30 @@ $lang['You don\'t have access to this photo'] = 'Δεν έχετε πρόσβα
 $lang['You have %d orphan tags %s'] = 'Έχετε %d ορφανές ετικέτες %s';
 $lang['You have %s inactive plugins'] = 'Έχετε %s ανενεργά πρόσθετα';
 $lang['You have %s1 orphan : %s2'] = 'Έχετε %s1 ορφανά: %s2';
-$lang['You have unsaved changes'] = 'Έχετε αλλαγές που δεν έχουν αποθηκευθεί';
\ No newline at end of file
+$lang['You have unsaved changes'] = 'Έχετε αλλαγές που δεν έχουν αποθηκευθεί';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Δεν έχετε δικαίωμα αλλαγής του Κύριου Χρήστη, παρακαλώ ρωτήστε τον Διαχειριστή του ιστότοπού σας';
+$lang['You can now change the main user from %s to %s.'] = 'Μπορείτε τώρα να αλλάξετε τον Κύριο Χρήστη από %s σε %s';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Δεν μπορείτε να αντιγράψετε τον κωδικό αν η σύνδεση με αυτό τον ιστότοπο δεν είναι ασφαλής.';
+$lang['Copy password'] = 'Αντέγραψε τον κωδικό';
+$lang['Copy the password link'] = 'Αντέγραψε τον σύνδεσμο του κωδικού';
+$lang['Main user'] = 'Κύριος Χρήστης';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Αυτός ο χρήστης πρέπει πρώτα να οριστεί σαν Διαχειριστής του ιστότοπου πριν μπορέσει να αναβαθμιστεί σε Κύριο Χρήστη';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Για να είστε σίγοιρος, παρακαλώ ξαναγράψτε την λέξη "%s" παρακάτω';
+$lang['Username successfully modified'] = 'Το όνομα χρήστη άλλαξε με επιτυχία';
+$lang['Yes, let\'s proceed'] = 'Ναι, ας προχωρήσουμε';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Πρόκειται να ορίσετε τον %s σαν Κύριο Χρήστη αντί του %s, θέλετε να προχωρήσετε;';
+$lang['The passwords do not match'] = 'Οι κωδικοί δεν ταιριάζουν';
+$lang['Set as main user'] = 'Όρισέ τον σαν Κύριο Χρήστη';
+$lang['Resend password link'] = 'Επανααποστολή του συνδέσμου του κωδικού';
+$lang['Please complete all fields'] = 'Παρακαλώ συμπληρώστε όλα τα πεδία';
+$lang['Password copied'] = 'Ο κωδικός αντιγράφηκε';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Αντιγράψτε τον παρακάτω σύνδεσμο και στείλτε τον στον χρήστη για να μπορέσει να οριστεί ο κωδικός.';
+$lang['Copied link'] = 'Αντιγραμμένος σύνδεσμος';
+$lang['Changing the main user'] = 'Αλλάζω τον Κύριο Χρήστη';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Δεν είναι δυνατόν να σταλεί μήνημα σε αυτό τον χρήστη επειδή δεν έχει διεύθυνση.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Ένας σύνδεσμος ενεργοποίησης που ισχύει για 1 ώρα δημιουργήθηκε αλλά δεν στάθηκε δυνατό να αποσταλεί. Μπορείτε τώρα να αντιγράψετε τον παρακάτω σύνδεσμο και να τον στείλετε στον χρήστη.';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Ένας σύνδεσμος ενεργοποίησης στάλθηκε στον "%s" που ισχύει για 1 ώρα. Αν ο χρήστης δεν λάβει τον σύνδεσμο, μπορείτε να δημιουργήσετε και να αντιγράψετε έναν νέο, με το να επεξεργαστείτε τον χρήστη και να δημιουργήσετε ένα καινούριο κωδικό.';
+$lang['%s is the new main user'] = '%s είναι ο νέος Κύριος Χρήστης';
+$lang['Ok, got it!'] = 'Εντάξει, το \'πιασα!';
+$lang['Read the release note'] = 'Διαβάστε την ανακοίνωση';
+$lang['What\'s new in version %s'] = 'Τί νέο υπάρχει στην έκδοση %s;';
\ No newline at end of file
diff --git a/language/el_GR/common.lang.php b/language/el_GR/common.lang.php
index 71aecb05c..76db15cb2 100644
--- a/language/el_GR/common.lang.php
+++ b/language/el_GR/common.lang.php
@@ -451,4 +451,7 @@ $lang['Pages'] = 'Σελίδες';
 $lang['Only the first %d albums are displayed, out of %d.'] = 'Απεικονίζονται μόνο τα %d από %d άλμπουμ';
 $lang['Custom dates'] = 'Προσαρμοσμένες ημερομηνίες';
 $lang['Click here to display it'] = 'Κάντε κλίκ εδώ για να το δείτε';
-$lang['Album already selected'] = 'Το άλμπουμ έχει επιλεχθεί ήδη';
\ No newline at end of file
+$lang['Album already selected'] = 'Το άλμπουμ έχει επιλεχθεί ήδη';
+$lang['There are no authors available for the photos currently filtered'] = 'Δεν υπάρχουν πρόσωπα που έχουν αναρτήσει τις φωτογραφίες με το φίλτρο που έχει επιλεγεί';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Δεν υπάρχουν ημερομηνίες δημιουργίας με το φίλτρο των φωτογραφιών που έχει επιλεγεί';
+$lang['There are no tags available for the photos currently filtered'] = 'Δεν υπάρχουν ετικέτες με το φίλτρο των φωτογραφιών που έχει επιλεγεί';
\ No newline at end of file
diff --git a/language/el_GR/whats_new_15.lang.php b/language/el_GR/whats_new_15.lang.php
new file mode 100644
index 000000000..982eb7228
--- /dev/null
+++ b/language/el_GR/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['Even more filters for the gallery search engine'] = 'Ακόμη περισσότερα φίλτρα για τη μηχανή αναζήτησης της πινακοθήκης';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Νέα χαρακτηριστικά: Αρχεία καταγραφής δραστηριοτήτων και αναγνώστης αρχείων PDF';
+$lang['Enhanced interface for batch manager and album selector'] = 'Βελτιωμένη διεπαφή για την σειριακή διαχείριση και τον επιλογέα άλμπουμ';
+$lang['A new interface for user management'] = 'Μια νέα διεπαφή για διαχείριση χρηστών';
\ No newline at end of file
diff --git a/language/en_GB/common.lang.php b/language/en_GB/common.lang.php
index 2f69c4884..ae076076c 100644
--- a/language/en_GB/common.lang.php
+++ b/language/en_GB/common.lang.php
@@ -301,7 +301,7 @@ $lang['Album'] = 'Album';
 $lang['Album name, 1 &rarr; 5 &rarr; 10 &rarr; 100'] = 'Album name, 1 &rarr; 5 &rarr; 10 &rarr; 100';
 $lang['Album name, 100 &rarr; 10 &rarr; 5 &rarr; 1'] = 'Album name, 100 &rarr; 10 &rarr; 5 &rarr; 1';
 $lang['Album name, A &rarr; Z'] = 'Album name, A &rarr; Z';
-$lang['Album name, Z &rarr; A'] = 'Album name, A &rarr; Z';
+$lang['Album name, Z &rarr; A'] = 'Album name, Z &rarr; Z';
 $lang['Album results for'] = 'Album results for';
 $lang['Album: %s'] = 'Album: %s';
 $lang['%d photos per page'] = '%d photos per page';
diff --git a/language/es_ES/admin.lang.php b/language/es_ES/admin.lang.php
index 2f7739157..2b5a3a4ae 100644
--- a/language/es_ES/admin.lang.php
+++ b/language/es_ES/admin.lang.php
@@ -1370,4 +1370,30 @@ $lang['You have unsaved changes'] = 'Tiene cambios sin guardar';
 $lang['between %d and %d'] = 'entre %d y %d';
 $lang['image(s) contains unsaved changes'] = 'hay una o más imágenes con cambios sin guardar';
 $lang['level of confidentiality'] = 'nivel de confidencialidad';
-$lang['was succesfully deleted'] = 'se ha suprimido con éxito';
\ No newline at end of file
+$lang['was succesfully deleted'] = 'se ha suprimido con éxito';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'No se puede enviar un mensaje a este usuario porque no tiene una dirección de correo electrónico';
+$lang['Changing the main user'] = 'Cambiando el usuario principal';
+$lang['Copied link'] = 'Enlace copiado';
+$lang['Copy password'] = 'Copiar contraseña';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Copie el siguiente enlace y envíelo al usuario para que éste pueda establecer la contraseña.';
+$lang['Copy the password link'] = 'Copiar el enlace de contraseña';
+$lang['Main user'] = 'Usuario principal';
+$lang['Password copied'] = 'Contraseña copiada';
+$lang['Please complete all fields'] = 'Complete todos los campos';
+$lang['Resend password link'] = 'Reenviar enlace de contraseña';
+$lang['Set as main user'] = 'Establecer como usuario principal';
+$lang['The passwords do not match'] = 'Las contraseñas no coinciden';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Debe definirse este usuario como webmaster antes de que pueda actualizarse al usuario principal';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Para confirmarlo, vuelva a escribir la palabra "%s" a continuación';
+$lang['Username successfully modified'] = 'Nombre de usuario modificado correctamente';
+$lang['Yes, let\'s proceed'] = 'Sí, adelante';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Está a punto de establecer %s como usuario principal en lugar de %s. ¿Desea continuar?';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'No está autorizado a cambiar el usuario principal; consulte con su webmaster';
+$lang['You can now change the main user from %s to %s.'] = 'Ya puede cambiar el usuario principal de %s a %s.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'No puede copiar la contraseña si la conexión a este sitio no es segura.';
+$lang['%s is the new main user'] = '%s es el nuevo usuario principal';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Se ha enviado un enlace de activación válido por 1 hora a "%s". Si el usuario no recibe el enlace, puede generar y copiar uno nuevo editando el usuario y administrando su contraseña.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Se creó un enlace de activación válido por 1 hora pero no se pudo enviar. Puede copiar el enlace a continuación y enviárselo al usuario.';
+$lang['Ok, got it!'] = '¡De acuerdo, entendido!';
+$lang['Read the release note'] = 'Leer las notas de la versión';
+$lang['What\'s new in version %s'] = '¿Qué hay de nuevo en la versión %s?';
\ No newline at end of file
diff --git a/language/es_ES/common.lang.php b/language/es_ES/common.lang.php
index acb0420a0..701b5a9df 100644
--- a/language/es_ES/common.lang.php
+++ b/language/es_ES/common.lang.php
@@ -458,4 +458,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Sólo se muestran
 $lang['Pages'] = 'Páginas';
 $lang['The PDF you requested is too large to display on this page.'] = 'El PDF que ha solicitado es demasiado grande para mostrarlo en esta página';
 $lang['Custom dates'] = 'Fechas personalizadas';
-$lang['last 12 months'] = 'Los últimos 12 meses';
\ No newline at end of file
+$lang['last 12 months'] = 'Los últimos 12 meses';
+$lang['There are no authors available for the photos currently filtered'] = 'No hay autores disponibles para las fotos filtradas actualmente';
+$lang['There are no creation dates available for the photos currently filtered'] = 'No hay fechas de creación disponibles para las fotos filtradas actualmente';
+$lang['There are no tags available for the photos currently filtered'] = 'No hay etiquetas disponibles para las fotos filtradas actualmente';
\ No newline at end of file
diff --git a/language/es_ES/whats_new_15.lang.php b/language/es_ES/whats_new_15.lang.php
new file mode 100644
index 000000000..418bb9af7
--- /dev/null
+++ b/language/es_ES/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Una nueva interfaz de gestión de usuarios';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Características totalmente nuevas: registros de actividades y lector de PDF';
+$lang['Enhanced interface for batch manager and album selector'] = 'Interfaz mejorada para el gestor por lotes y el selector de álbumes';
+$lang['Even more filters for the gallery search engine'] = 'Aún más filtros para el motor de búsqueda de la galería';
\ No newline at end of file
diff --git a/language/et_EE/admin.lang.php b/language/et_EE/admin.lang.php
index e01cf5557..3b9411907 100644
--- a/language/et_EE/admin.lang.php
+++ b/language/et_EE/admin.lang.php
@@ -1290,4 +1290,6 @@ $lang['Posted %s'] = 'Postitatud %s';
 $lang['Plugin "%s" has been activated!'] = 'Plugin "%s" on aktiveeritud!';
 $lang['Plugin "%s" deleted!'] = 'Plugin "%s" on kustutatud!';
 $lang['Place last'] = 'Viimane koht';
-$lang['Place first'] = 'Esimene koht';
\ No newline at end of file
+$lang['Place first'] = 'Esimene koht';
+$lang['Added on %s'] = 'Lisatud %s';
+$lang['Activate create mode to create and select an album'] = 'Albumi loomiseks ja valimiseks aktiveerige loomisrežiim';
\ No newline at end of file
diff --git a/language/et_EE/common.lang.php b/language/et_EE/common.lang.php
index 39b85e247..1500753f5 100644
--- a/language/et_EE/common.lang.php
+++ b/language/et_EE/common.lang.php
@@ -464,4 +464,14 @@ $lang['Albums found'] = 'Leitud albumeid';
 $lang['Album title'] = 'Albumi pealkiri';
 $lang['Album description'] = 'Albumi kirjeldus';
 $lang['%d visits'] = '%d külastust';
-$lang['Added by'] = 'Lisas';
\ No newline at end of file
+$lang['Added by'] = 'Lisas';
+$lang['There are no authors available for the photos currently filtered'] = 'Filtreeritud fotode jaoks pole autoreid saadaval';
+$lang['last 12 months'] = 'Viimased 12 kuud';
+$lang['There are no tags available for the photos currently filtered'] = 'Filtreeritud fotode jaoks pole silte saadaval';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Filtreeritud fotode jaoks pole loomiskuupäevi saadaval';
+$lang['The PDF you requested is too large to display on this page.'] = 'Taotletud PDF on sellel lehel kuvamiseks liiga suur.';
+$lang['Pages'] = 'Leheküljed';
+$lang['Only the first %d albums are displayed, out of %d.'] = 'Kuvatakse ainult esimene %d albumit %d-st.';
+$lang['Custom dates'] = 'Kohandatud kuupäevad';
+$lang['Click here to display it'] = 'Selle kuvamiseks klõpsake siin';
+$lang['Album already selected'] = 'Album on juba valitud';
\ No newline at end of file
diff --git a/language/eu_ES/admin.lang.php b/language/eu_ES/admin.lang.php
index d9e01f0c4..e4fa2c7ea 100755
--- a/language/eu_ES/admin.lang.php
+++ b/language/eu_ES/admin.lang.php
@@ -1367,4 +1367,27 @@ $lang['Creation mode'] = 'Sorkuntza modua';
 $lang['Select or create an album'] = 'Hautatu edo sortu albuma';
 $lang['Create your first album'] = 'Sortu lehenengo albuma';
 $lang['Create and select'] = 'Sortu eta hautatu';
-$lang['Create a root album'] = 'Sortu erro-albuma';
\ No newline at end of file
+$lang['Create a root album'] = 'Sortu erro-albuma';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Ordu bateko baliodun aktibazio-esteka bidali da "%s"(e)ra. Erabiltzaileak ez baldin badu esteka jaso, berri bat sortu eta kopiatu dezakezu erabiltzailea editatuz eta pasahitza kudeatuz.';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Ziurtatzeko, idatzi "%s" hitza behealdean';
+$lang['Username successfully modified'] = 'Erabiltzaile-izena zuzen aldatu da';
+$lang['Yes, let\'s proceed'] = 'Bai, aurrera';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = '%s erabiltzaile nagusi modura ezartzen zoaz %s (r)en ordez, ziur al zaude?';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Ez duzu erabiltzaile nagusia aldatzeko baimenik, jo web-arduradunarengana';
+$lang['You can now change the main user from %s to %s.'] = 'Orain erabiltzaile nagusia alda dezakezu %s (e)tik %s (e)ra.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Ezin duzu pasahitza kopiatu gune honetako konexioa ez baita fidagarria.';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Erabiltzailea web-arduradun bezala definitu behar da erabiltzaile nagusi bezala eguneratu baino lehen';
+$lang['%s is the new main user'] = '%s da erabiltzaile nagusi berria';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Ordu baterako baliodun aktibazio esteka sortu da baina ezin izan da bidali. Kopiatu behekaldeko esteka eta bidal iezaiozu erabiltzaileari.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Ezin izan da posta elektronikorik bidali ez duelako helbide elektronikorik jarri.';
+$lang['Changing the main user'] = 'Erabiltzaile nagusia aldatzen';
+$lang['Copied link'] = 'Kopiatutako esteka';
+$lang['Copy password'] = 'Kopiatu pasahitza';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Kopiatu behekaldeko esteka eta erabiltzaileari bidal iezaiozu pasahitza ezartzeko.';
+$lang['Copy the password link'] = 'Kopiatu pasahitzaren esteka';
+$lang['Main user'] = 'Erabiltzaile nagusia';
+$lang['Password copied'] = 'Pasahitza kopiatu egin da';
+$lang['Please complete all fields'] = 'Bere eremu guztiak';
+$lang['Resend password link'] = 'Birbidali pasahitzaren esteka';
+$lang['Set as main user'] = 'Ezarri erabiltzaile nagusi modura';
+$lang['The passwords do not match'] = 'Pasahitzek ez dute bat egiten';
\ No newline at end of file
diff --git a/language/eu_ES/whats_new_15.lang.php b/language/eu_ES/whats_new_15.lang.php
new file mode 100644
index 000000000..d3ccd6da5
--- /dev/null
+++ b/language/eu_ES/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['Enhanced interface for batch manager and album selector'] = 'Interfaze areagotua multzo-kudeatzailerako eta album-hautatzailea';
+$lang['Even more filters for the gallery search engine'] = 'Iragazki gehiago galeri-bilatzailearen motorrerako';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Ezaugarri berri-berriak: ekintzen egunerokoak eta PDF bisorea';
+$lang['A new interface for user management'] = 'Interfaze berria erabiltzaileen kudeketarako';
\ No newline at end of file
diff --git a/language/fi_FI/admin.lang.php b/language/fi_FI/admin.lang.php
index ca218acb6..5b70ca321 100644
--- a/language/fi_FI/admin.lang.php
+++ b/language/fi_FI/admin.lang.php
@@ -1228,4 +1228,39 @@ $lang['The settings for the guest are from the %s user'] = 'Vieraan asetukset ov
 $lang['The picture dimensions will be reduced to %dx%d pixels.'] = 'Kuvan ulottuvuudet kutistetaan kokoon %dx%d.';
 $lang['The other tags will be removed'] = 'Muut tagit poistetaan';
 $lang['Tags <em>%s</em> merged into tag <em>%s</em>'] = 'Tagit <em>%s</em> yhdistetty tagiksi <em>%s</em>';
-$lang['Tags \{%s\} succesfully deleted'] = 'Tagit \{%s\} poistettiin onnistuneesti';
\ No newline at end of file
+$lang['Tags \{%s\} succesfully deleted'] = 'Tagit \{%s\} poistettiin onnistuneesti';
+$lang['was succesfully deleted'] = 'poistettiin onnistuneesti';
+$lang['This group will be unset to default'] = 'Tätä ryhmää ei enää käytetä oletuksena';
+$lang['This group will be set to default'] = 'Tätä ryhmää käytetään oletuksena';
+$lang['This album contains %d photos, added between %s and %s.'] = 'Tässä albumissa on %d kuvaa, jotka on lisätty %s ja %s välillä.';
+$lang['This album contains %d photos, added on %s.'] = 'Tässä albumissa on %d kuvaa, jotka on lisätty %s.';
+$lang['This album contains no photo.'] = 'Tässä albumissa ei ole yhtään kuvaa.';
+$lang['There is no other language available.'] = 'Muuta kieltä ei ole saatavilla.';
+$lang['There is no other plugin available.'] = 'Muuta liitännäistä ei ole saatavilla.';
+$lang['There is no other theme available.'] = 'Muuta teemaa ei ole saatavilla.';
+$lang['The name of a group must not contain " or \' or be empty.'] = 'Ryhmän nimessä ei saa olla " tai \' eikä se saa olla tyhjä.';
+$lang['There is no available subscribers to mail.'] = 'Sähköposti-ilmoituksen tilaajia ei ole.';
+$lang['There is no group in this gallery.'] = 'Tässä galleriassa ei ole ryhmää.';
+$lang['The whole page'] = 'Koko sivu';
+$lang['The whole set'] = 'Koko setti';
+$lang['Theme'] = 'Teema';
+$lang['The original maximum height must be a number between %d and %d'] = 'Alkuperäisen kuvan korkeuden on oltava numero väliltä %d-%d';
+$lang['The original maximum width must be a number between %d and %d'] = 'Alkuperäisen kuvan leveyden on oltava numero väliltä %d-%d';
+$lang['The original image quality must be a number between %d and %d'] = 'Alkuperäisen kuvanlaadun on oltava numero väliltä %d-%d';
+$lang['The name of an album must not be empty'] = 'Albumin nimi ei saa olla tyhjä';
+$lang['The number of comments a page must be between 5 and 50 included.'] = 'Sivulla olevien kommenttien määrän täytyy olla 5 ja 50 välillä.';
+$lang['There is multiple image in the database with the following names : %s.'] = 'Nimillä %s on tietokannassa useampia kuvia.';
+$lang['This album is currently locked, visible only to administrators.'] = 'Tämä albumi on lukittu ja näkyy vain ylläpitäjille.';
+$lang['The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form'] = 'Lähetetty tiedosto ylittää HTML-lomakkeessa määritellyn MAX_FILE_SIZE-asetuksen';
+$lang['The passwords do not match'] = 'Salasanat eivät ole samat';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Kopioi lnikki alta ja lähetä se käyttäjälle salasanan asettamiseksi.';
+$lang['Copy the password link'] = 'Kopioi salasanalinkki';
+$lang['Main user'] = 'Pääkäyttäjä';
+$lang['Password copied'] = 'Salasana kopioitu';
+$lang['Please complete all fields'] = 'Täytäthän kaikki kentät';
+$lang['Resend password link'] = 'Lähetä salasanalinkki uudelleen';
+$lang['Set as main user'] = 'Aseta pääkäyttäjäksi';
+$lang['%s is the new main user'] = '%s on uusi pääkäyttäjä';
+$lang['Changing the main user'] = 'Vaihdetaan pääkäyttäjä';
+$lang['Copied link'] = 'Kopioitu linkki';
+$lang['Copy password'] = 'Kopioi salasana';
\ No newline at end of file
diff --git a/language/fi_FI/common.lang.php b/language/fi_FI/common.lang.php
index e0696c903..e535ec139 100644
--- a/language/fi_FI/common.lang.php
+++ b/language/fi_FI/common.lang.php
@@ -452,4 +452,7 @@ $lang['Albums found'] = 'Albumeita löydetty';
 $lang['Albums listed here match your search by word. Click on one to browse by album.'] = 'Tässä listatut albumit vastaavat hakusanaasi. Klikkaa sellaisesta selataksesi albumeittain.';
 $lang['Click here to display it'] = 'Klikkaa tästä näyttääksesi sen';
 $lang['last 12 months'] = 'Viimeisimmät 12 kuukautta';
-$lang['Custom dates'] = 'Tietyt päivät';
\ No newline at end of file
+$lang['Custom dates'] = 'Tietyt päivät';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Nykyisen suodatuksen mukaisille kuville ei ole saatavissa luomispäiviä';
+$lang['There are no tags available for the photos currently filtered'] = 'Nykyisen suodatuksen mukaisille kuville ei ole saatavissa tageja';
+$lang['There are no authors available for the photos currently filtered'] = 'Nykyisen suodatuksen mukaisille kuville ei ole saatavissa tekijätietoja';
\ No newline at end of file
diff --git a/language/fi_FI/whats_new_15.lang.php b/language/fi_FI/whats_new_15.lang.php
new file mode 100644
index 000000000..185cc25df
--- /dev/null
+++ b/language/fi_FI/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['Enhanced interface for batch manager and album selector'] = 'Paranneltu käyttöliittymä massahallintatyökalulle ja albumivalitsijalle';
+$lang['Even more filters for the gallery search engine'] = 'Entistä enemmän suodattimia gallerian hakukoneeseen';
+$lang['A new interface for user management'] = 'Uusi käyttäjähallinnan käyttöliittymä';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Uusia ominaisuuksia: Toimintalokit ja PDF-lukija';
\ No newline at end of file
diff --git a/language/fr_CA/admin.lang.php b/language/fr_CA/admin.lang.php
index 87e700fce..bc8e889a2 100644
--- a/language/fr_CA/admin.lang.php
+++ b/language/fr_CA/admin.lang.php
@@ -41,7 +41,7 @@ $lang['Add a user'] = "Ajouter un utilisateur";
 $lang['Add group'] = "Ajouter un groupe";
 $lang['Add'] = "Ajouter";
 $lang['Allow user registration'] = "Permettre l'enregistrement des utilisateurs";
-$lang['Apply to sub-albums'] = "Appliquer aux sous-catégories";
+$lang['Apply to sub-albums'] = 'Appliquer aux sous-albums';
 $lang['Associated'] = "Associée à";
 $lang['Caddie management'] = "Gestion du panier";
 $lang['Caddie'] = "Panier";
@@ -87,7 +87,7 @@ $lang['Maintenance'] = "Maintenance";
 $lang['Edit album permissions'] = 'Gérer les permissions pour un album';
 $lang['Manage permissions for group "%s"'] = "Gérer les permissions pour le groupe \"%s\"";
 $lang['Manage permissions for user "%s"'] = "Gérer les permissions pour l'utilisateur \"%s\"";
-$lang['Manage tags'] = "Gérer les mots clés";
+$lang['Manage tags'] = 'Gérer les mots-clés';
 $lang['Members'] = "Membres";
 $lang['Metadata synchronized from file'] = "Méta-données synchronisées à partir du fichier";
 $lang['Move albums'] = 'Déplacer les albums';
@@ -329,7 +329,7 @@ $lang['Update photos information'] = "Mettre à jour les informations des images
 $lang['Synchronize'] = "Synchroniser";
 $lang['reduce to single existing albums'] = 'Traiter uniquement un album';
 $lang['Choose an option'] = "Choisir une option";
-$lang['display maximum informations (added albums and photos, deleted albums and photos)'] = "Afficher un maximum d'informations (catégories ajoutées, éléments ajoutés, catégories et éléments supprimés)";
+$lang['display maximum informations (added albums and photos, deleted albums and photos)'] = 'Afficher un maximum d\'informations (albums ajoutés, éléments ajoutés, albums et éléments supprimés)';
 $lang['Error list'] = "Liste des erreurs";
 $lang['Errors caption'] = "Légende des erreurs";
 $lang['Detailed informations'] = "Informations détaillées";
@@ -385,7 +385,7 @@ $lang['Properties'] = "Propriétés";
 $lang['An information email was sent to group "%s"'] = 'Un courriel d\'information a été envoyé aux membres du groupe "%s"';
 $lang['Send an information email to group members'] = "Envoyer un courriel d'informations aux membres d'un groupe";
 $lang['Group'] = "Groupe";
-$lang['[%s] Visit album %s'] = "[%s] Venez visiter la catégorie %s";
+$lang['[%s] Visit album %s'] = '[%s] Venez visiter l\'album %s';
 $lang['Hello,'] = "Bonjour,";
 $lang['See you soon.'] = "À bientôt.";
 $lang['Discover album:'] = 'Venez découvrir l\'album:';
@@ -456,7 +456,7 @@ $lang['Correction the anomaly will cancel the fact that it\'s ignored'] = "L'ano
 $lang['%d anomaly has been ignored.'] = "%d anomalie a été ignorée.";
 $lang['%d anomalies have been ignored.'] = "%d anomalies ont été ignorées.";
 $lang['Plugins which need upgrade'] = 'Greffons à mettre à jour';
-$lang['Plugin list'] = 'Liste des greffon';
+$lang['Plugin list'] = 'Liste des greffons';
 $lang['Check for updates'] = "Rechercher les mises à jour";
 $lang['Other plugins'] = "Autres plugins disponibles";
 $lang['Last revisions'] = "Dernières révisions";
@@ -762,11 +762,11 @@ $lang['Manage Permissions'] = 'Gérer les permissions';
 $lang['Photo %s of %s'] = 'Photo %s sur %s';
 $lang['show details'] = 'montrer les détails';
 $lang['hide details'] = 'cacher les détails';
-$lang['Merge tags'] = 'Fusionner les mots clés';
-$lang['Select the destination tag'] = 'Sélectionnez le mot clé de destination';
+$lang['Merge tags'] = 'Fusionner les mots-clés';
+$lang['Select the destination tag'] = 'Sélectionnez le mot-clé de destination';
 $lang['(this tag will be deleted)'] = '(ce mot-clé sera supprimé)';
 $lang['Confirm merge'] = 'Confirmez la fusion';
-$lang['Merge selected tags'] = 'Fusionner les mots clés sélectionnés';
+$lang['Merge selected tags'] = 'Fusionner les mots-clés sélectionnés';
 $lang['No destination tag selected'] = 'Vous n\'avez pas sélectionné de mot clé de destination';
 $lang['Tags <em>%s</em> merged into tag <em>%s</em>'] = 'Les mots-clés <em>%s</em> ont été fusionnés dans le mot clé <em>%s</em>';
 $lang['Select at least two tags for merging'] = 'Sélectionnez au moins deux mots clés pour la fusion';
@@ -776,7 +776,7 @@ $lang['If no HD is available and if the current websize is bigger than resize di
 $lang['An error has occured during upgrade.'] = 'Une erreur est survenue pendant la mise à jour.';
 $lang['An error has occured during extract. Please check files permissions of your piwigo installation.<br><a href="%s">Click here to show log error</a>.'] = 'Impossible d\'extraire les fichiers. Veuillez vérifier les permissions des fichiers de votre installation.<br><a href="%s">Cliquez ici pour voir le rapport d\'erreur</a>.';
 $lang['Piwigo cannot retrieve upgrade file from server'] = 'Piwigo ne peut pas récupérer le fichier de mise à jour depuis le serveur';
-$lang['Send connection settings by email'] = 'Envoyer les identifiants par email';
+$lang['Send connection settings by email'] = 'Envoyer les identifiants par courriel';
 $lang['Activate comments'] = 'Activer les commentaires';
 $lang['Default comments order'] = 'Ordre par défaut des commentaires';
 $lang['%s has been successfully updated.'] = '%s a été mis à jour avec succès.';
@@ -931,7 +931,7 @@ $lang['between %.2f and %.2f'] = 'entre %.2f et %.2f';
 $lang['Purge user cache'] = 'Purger le cache utilisateur';
 $lang['The picture dimensions will be reduced to %dx%d pixels.'] = 'La tailles des images sera réduite à %dx%d pixels.';
 $lang['Resize after upload disabled due to the use of GD as graphic library'] = 'Redimensionnement après transfert désactivé car GD est la librairie graphique utilisée actuellement';
-$lang['Select at least one tag'] = 'Sélectionnez au moins un mot clé';
+$lang['Select at least one tag'] = 'Sélectionnez au moins un mot-clé';
 $lang['Basic settings'] = 'Paramètres de base';
 $lang['General'] = 'Général';
 $lang['Mail theme'] = 'Thème des courriels';
@@ -970,7 +970,7 @@ $lang['between %s and %s MB'] = 'entre %s et %s Mo';
 $lang['date & time'] = 'date et heure';
 $lang['file name'] = 'nom de fichier';
 $lang['width & height'] = 'largeur et hauteur';
-$lang['Select tags'] = 'Sélectionner des mots clés';
+$lang['Select tags'] = 'Sélectionner des mots-clés';
 $lang['Each email sent will contain its own automatic authentication key on links, valid for %s.'] = 'Chaque courriel envoyé contiendra sa propre clef d\'identification automatique sur les liens, valide %s.';
 $lang['No tags selected, no actions possible.'] = 'Aucun mot-clé sélectionné, aucune action possible.';
 $lang['checksums to add'] = 'Checksums à ajouter';
@@ -1012,4 +1012,10 @@ $lang['Some photos are missing from your file system. Details provided by plugin
 $lang['%d tags added'] = '%d mots-clés ajoutés';
 $lang['%d tags deleted'] = '%d mots-clés supprimés';
 $lang['%d tags edited'] = '%d mots-clés édités';
-$lang['%d tags moved'] = '%d mots-clés déplacés';
\ No newline at end of file
+$lang['%d tags moved'] = '%d mots-clés déplacés';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Vous ne pouvez pas copier le mot de passe si la connexion à ce site n\'est pas sécurisée.';
+$lang['%d tag added'] = '%d mot-clé ajouté';
+$lang['%d tag deleted'] = '%d mot-clé supprimé';
+$lang['%d tag edited'] = '%d mot-clé édité';
+$lang['%d tag moved'] = '%d mot-clé déplacé';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Impossible d\'envoyer un courriel à cet utilisateur car il n\'a pas d\'adresse courriel';
\ No newline at end of file
diff --git a/language/fr_CA/common.lang.php b/language/fr_CA/common.lang.php
index 0c4371697..e866bc707 100644
--- a/language/fr_CA/common.lang.php
+++ b/language/fr_CA/common.lang.php
@@ -416,4 +416,5 @@ $lang['Invalid username or password!'] = 'Nom d\'utilisateur ou mot de passe inv
 $lang['Password: ********** (no copy by email)'] = 'Mot de passe : ********** (pas de copie par email)';
 $lang['Pre-established filters are proposed, but you can add or remove them using the "Choose filters" button.'] = 'Des filtres préétablis vous sont proposés, mais vous pouvez aussi en ajouter ou en retirer grâce au bouton "Choisir les filtres".';
 $lang['Tags found'] = 'Mots-clés trouvés';
-$lang['Tags listed here match your search by word. Click on one to browse by tag.'] = 'Les mots-clés ci-dessous correspondent à votre recherche par mot. Cliquez sur l\'un d\'eux pour basculer en navigation par mots-clés.';
\ No newline at end of file
+$lang['Tags listed here match your search by word. Click on one to browse by tag.'] = 'Les mots-clés ci-dessous correspondent à votre recherche par mot. Cliquez sur l\'un d\'eux pour basculer en navigation par mots-clés.';
+$lang['There are no tags available for the photos currently filtered'] = 'Aucun mot-clé n\'est disponible pour les photos actuellement filtrées';
\ No newline at end of file
diff --git a/language/hy_AM/common.lang.php b/language/hy_AM/common.lang.php
index 734bb5bbb..2e4ab7109 100755
--- a/language/hy_AM/common.lang.php
+++ b/language/hy_AM/common.lang.php
@@ -444,4 +444,14 @@ $lang['%d photos per page'] = '%d լուսանկար էջում';
 $lang['%d new photo'] = '%d նոր լուսանկար';
 $lang['%d new comment'] = '%d նոր մեկնաբանություն';
 $lang['%d hit'] = '%d հիթ';
-$lang['%d comment'] = '%d մեկնաբանություն';
\ No newline at end of file
+$lang['%d comment'] = '%d մեկնաբանություն';
+$lang['Album already selected'] = 'Ալբոմը արդեն ընտրված է';
+$lang['Click here to display it'] = 'Սեղմեք այստեղ, ցուցադրելու համար';
+$lang['Custom dates'] = 'Անձնականացված ամսաթվեր';
+$lang['Only the first %d albums are displayed, out of %d.'] = 'Միայն առաջին %d ալբոմներն են ցուցադրվում, ընդհանուրում %d-ից:';
+$lang['Pages'] = 'Էջեր';
+$lang['The PDF you requested is too large to display on this page.'] = 'Ձեր խնդրած PDF-ը չափազանց մեծ է, որպեսզի ցուցադրվի այս էջում:';
+$lang['There are no authors available for the photos currently filtered'] = 'Ֆիլտրված լուսանկարների համար հեղինակներ չկան';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Ֆիլտրված լուսանկարների համար ստեղծման ամսաթվեր չկան';
+$lang['There are no tags available for the photos currently filtered'] = 'Ֆիլտրված լուսանկարների համար տեգեր չկան';
+$lang['last 12 months'] = 'Վերջին 12 ամիսը';
\ No newline at end of file
diff --git a/language/is_IS/admin.lang.php b/language/is_IS/admin.lang.php
index dbbeaf637..649bba1f7 100755
--- a/language/is_IS/admin.lang.php
+++ b/language/is_IS/admin.lang.php
@@ -1368,4 +1368,31 @@ $lang['Save'] = 'Vista';
 $lang['Select or create an album'] = 'Velja eða stofna albúm';
 $lang['System Activities'] = 'Kerfisvirkni';
 $lang['Who can see ?'] = 'Hverja getum við séð ?';
-$lang['You have unsaved changes'] = 'Þú ert með óvistaðar breytingar';
\ No newline at end of file
+$lang['You have unsaved changes'] = 'Þú ert með óvistaðar breytingar';
+$lang['Set as main user'] = 'Setja sem aðalnotanda';
+$lang['The passwords do not match'] = 'Lykilorðin passa ekki saman';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Þessi notandi verður fyrst að vera skilgreindur sem vefstjóri áður en hægt er að uppfæra hann í aðalnotanda';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Til að vera viss, vinsamlegast endurskrifaðu orðið “%s” hér að neðan';
+$lang['Username successfully modified'] = 'Notandanafni breytt';
+$lang['Yes, let\'s proceed'] = 'Já, höldum áfram';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Þú ert að fara að setja %s sem aðalnotanda í stað %s, viltu halda áfram?';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Þú hefur ekki heimild til að breyta aðalnotandanum, vinsamlegast spurðu vefstjórann þinn';
+$lang['You can now change the main user from %s to %s.'] = 'Þú getur núna breytt aðalnotandanum úr %s í %s.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Þú getur ekki afritað lykilorðið ef tengingin við þessa síðu er ekki örugg.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Get ekki sent tölvupóst til þessa notanda vegna þess að hann er ekki með netfang';
+$lang['Changing the main user'] = 'Að skipta um aðalnotanda';
+$lang['Copied link'] = 'Afritaður tengill';
+$lang['Copy password'] = 'Afritaðu lykilorð';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Afritaðu hlekkinn hér að neðan og sendu til notandans svo hægt sé að stilla lykilorðið.';
+$lang['Copy the password link'] = 'Afritaðu lykilorðstengilinn';
+$lang['Main user'] = 'Aðalnotandi';
+$lang['Password copied'] = 'Lykilorð afritað';
+$lang['Please complete all fields'] = 'Vinsamlega fylltu út alla reiti';
+$lang['Resend password link'] = 'Senda lykilorðstengil aftur';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Virkjunartengill sem gilti í 1 klukkustund var útbúinn en ekki var hægt að senda hann. Þú getur nú afritað hlekkinn hér að neðan og sent til notandans.';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Virkjunartengill sem gildir í 1 klukkustund hefur verið sendur á "%s". Ef notandinn fær ekki hlekkinn geturðu útbúið og afritað nýjan með því að breyta notandanum og stjórna lykilorðinu hans.';
+$lang['%s is the new main user'] = '
+%s er nýi aðalnotandinn';
+$lang['Ok, got it!'] = 'Í lagi, náði því!';
+$lang['Read the release note'] = 'Lestu útgáfuskýrsluna';
+$lang['What\'s new in version %s'] = 'Hvað er nýtt í útgáfu %s?';
\ No newline at end of file
diff --git a/language/is_IS/common.lang.php b/language/is_IS/common.lang.php
index 508539091..e855273cf 100644
--- a/language/is_IS/common.lang.php
+++ b/language/is_IS/common.lang.php
@@ -449,4 +449,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Aðeins fyrstu %d
 $lang['Pages'] = 'Síður';
 $lang['The PDF you requested is too large to display on this page.'] = 'PDF-skjalið sem þú baðst um er of stórt til að birta á þessari síðu.';
 $lang['Custom dates'] = 'Sérsniðnar dagsetningar';
-$lang['last 12 months'] = 'Síðustu 12 mánuðir';
\ No newline at end of file
+$lang['last 12 months'] = 'Síðustu 12 mánuðir';
+$lang['There are no authors available for the photos currently filtered'] = 'Það eru engir höfundar tiltækir fyrir síuðu myndirnar';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Það eru engar sköpunardagsetningar í boði fyrir síuðu myndirnar';
+$lang['There are no tags available for the photos currently filtered'] = 'Það eru engin merki tiltæk fyrir síuðu myndirnar';
\ No newline at end of file
diff --git a/language/is_IS/whats_new_15.lang.php b/language/is_IS/whats_new_15.lang.php
new file mode 100644
index 000000000..0b3693f3e
--- /dev/null
+++ b/language/is_IS/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Nýtt viðmót fyrir notendastjórnun';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Glænýir eiginleikar: Athafnaskrár og PDF lesari';
+$lang['Enhanced interface for batch manager and album selector'] = 'Aukið viðmót fyrir lotustjóra og albúmval';
+$lang['Even more filters for the gallery search engine'] = 'Jafnvel fleiri síur fyrir galleríleitarvélina';
\ No newline at end of file
diff --git a/language/it_IT/admin.lang.php b/language/it_IT/admin.lang.php
index a53d8550c..cc88563c2 100644
--- a/language/it_IT/admin.lang.php
+++ b/language/it_IT/admin.lang.php
@@ -43,8 +43,8 @@ $lang['Add'] = 'Aggiungere';
 $lang['Allow user registration'] = 'Consentire registrazione degli utenti';
 $lang['Apply to sub-albums'] = 'Applicare ai sub-album';
 $lang['Associated'] = 'Associato a';
-$lang['Caddie management'] = 'Gestione del cestino';
-$lang['Caddie'] = 'Cestino';
+$lang['Caddie management'] = 'Gestione del carrello';
+$lang['Caddie'] = 'Carrello';
 $lang['Albums authorized thanks to group associations'] = 'Album accessibili grazie all\'appartenenza ai gruppi';
 $lang['Album manual order was saved'] = 'L\'ordinamento manuale degli album è stato salvato';
 $lang['Album photos associated to the following albums: %s'] = 'Le foto dell\'album sono stati associati agli album seguenti: %s';
@@ -429,7 +429,7 @@ $lang['Main "webmaster" user does not exist'] = 'L\'utente "webmaster" principal
 $lang['Main "webmaster" user status is incorrect'] = 'Lo stato dell\'utente "webmaster" principale non è corretto';
 $lang['User "%s" created with "%s" like password'] = 'L\'utente "%s" creato con la password "%s"';
 $lang['Status of user "%s" updated'] = 'Stato dell\'utente "%s" aggiornato';
-$lang['add new photos to caddie'] = 'Aggiungere le nuove foto al cestino';
+$lang['add new photos to caddie'] = 'Aggiungere le nuove foto al carrello';
 $lang['No display'] = 'Nessuna visualizzazione';
 $lang['Classic display'] = 'Visualizzazione classica';
 $lang['Hoverbox display'] = 'Visualizzazione durante il passaggio del mouse';
@@ -683,7 +683,7 @@ $lang['Week starts on'] = 'La settimana comincia il';
 $lang['You have %d orphan tags: %s.'] = 'Avete %d tags orfani: %s.';
 $lang['Delete orphan tags'] = 'Cancellare i tags orfani';
 $lang['delete photo'] = 'cancellare la foto';
-$lang['Remove from caddie'] = 'Rimuovere dal cestino';
+$lang['Remove from caddie'] = 'Rimuovere dal carrello';
 $lang['Themes which need upgrade'] = 'Temi che necessitano un aggiornamento';
 $lang['Languages which need upgrade'] = 'Lingue che necessitano di un aggiornamento ';
 $lang['All themes are up to date.'] = 'Tutti i temi sono aggiornati.';
@@ -778,7 +778,7 @@ $lang['With no virtual album'] = 'Senza album virtuale';
 $lang['Predefined filter'] = 'Filtro predefinito';
 $lang['Add tags'] = 'Aggiungere i tags';
 $lang['Synchronize metadata'] = 'Sincronizzare i metadati';
-$lang['Add to caddie'] = 'Aggiungere al cestino';
+$lang['Add to caddie'] = 'Aggiungere al carrello';
 $lang['Zoom'] = 'Zoom';
 $lang['Resize after upload'] = 'Ridimensionare dopo il caricamento';
 $lang['Resize after upload disabled due to the use of GD as graphic library'] = 'Ridimensionamento dopo l\'upload disattivato a causa dell\'uso di GD come libreria grafica';
diff --git a/language/it_IT/common.lang.php b/language/it_IT/common.lang.php
index 03c097090..6006f5973 100644
--- a/language/it_IT/common.lang.php
+++ b/language/it_IT/common.lang.php
@@ -449,4 +449,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Solo i primi %d a
 $lang['Pages'] = 'Pagine';
 $lang['The PDF you requested is too large to display on this page.'] = 'Il PDF che hai richiesto è troppo largo per essere mostrato in questa pagina';
 $lang['Custom dates'] = 'Date personalizzate';
-$lang['last 12 months'] = 'Ultimi 12 mesi';
\ No newline at end of file
+$lang['last 12 months'] = 'Ultimi 12 mesi';
+$lang['There are no authors available for the photos currently filtered'] = 'Non ci sono autori disponibili per le fotografie al momento filtrate';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Non vi sono date di creazione disponibili per le fotografie al momento filtrate';
+$lang['There are no tags available for the photos currently filtered'] = 'Non ci sono etichette disponibili per le fotografie al momento filtrate';
\ No newline at end of file
diff --git a/language/ja_JP/admin.lang.php b/language/ja_JP/admin.lang.php
index bbe3a9cc9..2f472eaa4 100644
--- a/language/ja_JP/admin.lang.php
+++ b/language/ja_JP/admin.lang.php
@@ -1301,4 +1301,8 @@ $lang['Show plugins compatible with previous version of Piwigo'] = '以前のバ
 $lang['Show beta test plugins'] = 'ベータ版のテスト用プラグインを表示する';
 $lang['Create a new album at root'] = 'ルートに新しいアルバムを作成する';
 $lang['Rename "%s"'] = '「%s」をリネーム';
-$lang['Yes, rename'] = 'はい、リネームします';
\ No newline at end of file
+$lang['Yes, rename'] = 'はい、リネームします';
+$lang['Locked albums are disabled for maintenance. Only administrators can view them in the gallery. Lock this album will also lock his Sub-albums'] = 'ロックされたアルバムはメンテナンスのため使用不可にされています。管理者のみがギャラリー上でこのアルバムを閲覧できます。このアルバムをロックすることでアルバム内のサブアルバムもロックされます。';
+$lang['Modified'] = '編集時期';
+$lang['Created'] = '作成時期';
+$lang['This album is currently locked, visible only to administrators.'] = 'このアルバムは現在ロックされており、管理者のみ閲覧できます。';
\ No newline at end of file
diff --git a/language/nb_NO/admin.lang.php b/language/nb_NO/admin.lang.php
index 3b5f3ca04..4d162b264 100644
--- a/language/nb_NO/admin.lang.php
+++ b/language/nb_NO/admin.lang.php
@@ -1369,4 +1369,30 @@ $lang['Save'] = 'Lagre';
 $lang['Select or create an album'] = 'Velg eller opprett et album';
 $lang['System Activities'] = 'Systemaktiviteter';
 $lang['Who can see ?'] = 'Hvem kan se?';
-$lang['You have unsaved changes'] = 'Du har ulagrede endringer';
\ No newline at end of file
+$lang['You have unsaved changes'] = 'Du har ulagrede endringer';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Du er ikke autorisert til å endre hovedbruker. Spør webmaster';
+$lang['You can now change the main user from %s to %s.'] = 'Du kan nå endre hovedbrukeren fra %s til %s.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Du kan ikke kopiere passordet hvis tilkoblingen til denne siden ikke er sikker.';
+$lang['%s is the new main user'] = '%s er den nye hovedbrukeren';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'En aktiveringslenke gyldig i 1 time er sendt til "%s". Hvis brukeren ikke mottar lenken, kan du generere og kopiere en ny ved å redigere brukeren og administrere passordet deres.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'En aktiveringslenke gyldig i 1 time ble opprettet, men kunne ikke sendes. Du kan nå kopiere lenken nedenfor og sende den til brukeren.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Kan ikke sende en e-post til denne brukeren fordi han ikke har en e-postadresse';
+$lang['Changing the main user'] = 'Endre hovedbruker';
+$lang['Copied link'] = 'Kopiere lenke';
+$lang['Copy password'] = 'Kopiere passord';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Kopier lenken nedenfor og send den til brukeren slik at passordet kan settes';
+$lang['Copy the password link'] = 'Kopier passord lenken';
+$lang['Main user'] = 'Hoved bruker';
+$lang['Password copied'] = 'Passord kopiert';
+$lang['Please complete all fields'] = 'Fyll ut alle feltene';
+$lang['Resend password link'] = 'Send passordlenke på nytt';
+$lang['Set as main user'] = 'Angi som hovedbruker';
+$lang['The passwords do not match'] = 'Passordene stemmer ikke';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Denne brukeren må først defineres som webmaster før den kan oppgraderes til hovedbruker';
+$lang['To be sure, please rewrite the word “%s” below'] = 'For å være sikker, skriv om ordet "%s" nedenfor';
+$lang['Username successfully modified'] = 'Brukernavn ble endret';
+$lang['Yes, let\'s proceed'] = 'Ja, la oss fortsette';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Du er i ferd med å sette %s som hovedbruker i stedet for %s, vil du fortsette?';
+$lang['Ok, got it!'] = 'Ok, skjønner det!';
+$lang['Read the release note'] = 'Les utgivelsesnotatet';
+$lang['What\'s new in version %s'] = 'Hva er nytt i versjon %s?';
\ No newline at end of file
diff --git a/language/nb_NO/common.lang.php b/language/nb_NO/common.lang.php
index 983b5b73d..f708f8a66 100644
--- a/language/nb_NO/common.lang.php
+++ b/language/nb_NO/common.lang.php
@@ -448,4 +448,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Kun de første %d
 $lang['Pages'] = 'Sider';
 $lang['The PDF you requested is too large to display on this page.'] = 'PDF-en du ba om er for stor til å vises på denne siden.';
 $lang['Custom dates'] = 'Egendefinerte datoer';
-$lang['last 12 months'] = 'Siste 12 måneder';
\ No newline at end of file
+$lang['last 12 months'] = 'Siste 12 måneder';
+$lang['There are no authors available for the photos currently filtered'] = 'Det er ingen forfattere tilgjengelig for bildene som for øyeblikket er filtrert';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Det er ingen opprettelsesdatoer tilgjengelig for bildene som for øyeblikket er filtrert';
+$lang['There are no tags available for the photos currently filtered'] = 'Det er ingen etiketter tilgjengelig for bildene som for øyeblikket er filtrert';
\ No newline at end of file
diff --git a/language/nb_NO/whats_new_15.lang.php b/language/nb_NO/whats_new_15.lang.php
new file mode 100644
index 000000000..6d20cc576
--- /dev/null
+++ b/language/nb_NO/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Et nytt grensesnitt for brukeradministrasjon';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Helt nye funksjoner: Aktivitetslogger og PDF-leser';
+$lang['Enhanced interface for batch manager and album selector'] = 'Forbedret grensesnitt for batch manager og albumvelger';
+$lang['Even more filters for the gallery search engine'] = 'Enda flere filtre for gallerisøkemotoren';
\ No newline at end of file
diff --git a/language/nl_NL/admin.lang.php b/language/nl_NL/admin.lang.php
index 197884074..2dfa5c429 100644
--- a/language/nl_NL/admin.lang.php
+++ b/language/nl_NL/admin.lang.php
@@ -1373,4 +1373,30 @@ $lang['Create a root album'] = 'Maak een rootalbum';
 $lang['Create and select'] = 'Maken en selecteren';
 $lang['Create your first album'] = 'Maak je eerste album';
 $lang['Creation mode'] = 'Creatiemodus';
-$lang['First choose an album, then add your files'] = 'Kies eerst een album en voeg vervolgens uw bestanden toe';
\ No newline at end of file
+$lang['First choose an album, then add your files'] = 'Kies eerst een album en voeg vervolgens uw bestanden toe';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'U kunt het wachtwoord niet kopiëren als de verbinding met deze site niet beveiligd is.';
+$lang['You can now change the main user from %s to %s.'] = 'U kunt nu de hoofdgebruiker wijzigen van %s naar %s.';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'U bent niet bevoegd om de hoofdgebruiker te wijzigen, vraag dit aan uw webmaster.';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Om zeker te zijn, herschrijf dan het woord "%s" hieronder';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'U staat op het punt om %s in te stellen als hoofdgebruiker in plaats van %s. Wilt u doorgaan?';
+$lang['Yes, let\'s proceed'] = 'Ja, laten we doorgaan';
+$lang['Username successfully modified'] = 'Gebruikersnaam succesvol gewijzigd';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Deze gebruiker moet eerst worden gedefinieerd als webmaster voordat deze kan worden geüpgraded naar de hoofdgebruiker';
+$lang['The passwords do not match'] = 'De wachtwoorden komen niet overeen';
+$lang['Set as main user'] = 'Instellen als hoofdgebruiker';
+$lang['Resend password link'] = 'Wachtwoordlink opnieuw verzenden';
+$lang['Please complete all fields'] = 'Vul a.u.b alle velden in';
+$lang['Password copied'] = 'Wachtwoord gekopieerd';
+$lang['Main user'] = 'Hoofdgebruiker';
+$lang['Copy the password link'] = 'Kopieer de wachtwoordlink';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Kopieer de onderstaande link en stuur deze naar de gebruiker, zodat deze het wachtwoord kan instellen.';
+$lang['Copy password'] = 'Kopieer wachtwoord';
+$lang['Copied link'] = 'Gekopieerde link';
+$lang['Changing the main user'] = 'De hoofdgebruiker wijzigen';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Kan geen e-mail naar deze gebruiker sturen omdat hij geen e-mailadres heeft';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Er is een activeringslink gemaakt die 1 uur geldig is, maar deze kon niet worden verzonden. U kunt nu de onderstaande link kopiëren en naar de gebruiker verzenden.';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Er is een activeringslink verzonden naar "%s". Als de gebruiker de link niet ontvangt, kunt u een nieuwe link genereren en kopiëren door de gebruiker te bewerken en zijn wachtwoord te beheren.';
+$lang['%s is the new main user'] = '%s is de nieuwe hoofdgebruiker';
+$lang['Ok, got it!'] = 'Oké, begrepen!';
+$lang['Read the release note'] = 'Lees de release-opmerking';
+$lang['What\'s new in version %s'] = 'Wat is er nieuw in versie %s?';
\ No newline at end of file
diff --git a/language/nl_NL/common.lang.php b/language/nl_NL/common.lang.php
index e85a76254..ada2bdc23 100644
--- a/language/nl_NL/common.lang.php
+++ b/language/nl_NL/common.lang.php
@@ -469,4 +469,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Alleen de eerste
 $lang['Pages'] = 'Pagina\'s';
 $lang['The PDF you requested is too large to display on this page.'] = 'De door u opgevraagde PDF is te groot om op deze pagina weer te geven.';
 $lang['last 12 months'] = 'Laatste 12 maanden';
-$lang['Custom dates'] = 'Aangepaste data';
\ No newline at end of file
+$lang['Custom dates'] = 'Aangepaste data';
+$lang['There are no authors available for the photos currently filtered'] = 'Er zijn momenteel geen auteurs beschikbaar voor de gefilterde foto\'s';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Er zijn momenteel geen aanmaakdata beschikbaar voor de gefilterde foto\'s';
+$lang['There are no tags available for the photos currently filtered'] = 'Er zijn momenteel geen tags beschikbaar voor de gefilterde foto\'s';
\ No newline at end of file
diff --git a/language/nl_NL/whats_new_15.lang.php b/language/nl_NL/whats_new_15.lang.php
new file mode 100644
index 000000000..82dcd1e88
--- /dev/null
+++ b/language/nl_NL/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['Even more filters for the gallery search engine'] = 'Nog meer filters voor de galerijzoekmachine';
+$lang['Enhanced interface for batch manager and album selector'] = 'Verbeterde interface voor batchmanager en albumselector';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Gloednieuwe functies: activiteitenlogboeken en PDF-lezer';
+$lang['A new interface for user management'] = 'Een nieuwe interface voor gebruikersbeheer';
\ No newline at end of file
diff --git a/language/pl_PL/common.lang.php b/language/pl_PL/common.lang.php
index 6ac8cf287..7f8c41cdb 100644
--- a/language/pl_PL/common.lang.php
+++ b/language/pl_PL/common.lang.php
@@ -472,4 +472,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Wyświetlane jest
 $lang['Pages'] = 'Strony';
 $lang['The PDF you requested is too large to display on this page.'] = 'Plik PDF, o który prosiłeś, jest zbyt duży, aby wyświetlić go na tej stronie.';
 $lang['Custom dates'] = 'Niestandardowe daty';
-$lang['last 12 months'] = 'Ostatnie 12 miesięcy';
\ No newline at end of file
+$lang['last 12 months'] = 'Ostatnie 12 miesięcy';
+$lang['There are no authors available for the photos currently filtered'] = 'Brak dostępnych autorów dla aktualnie filtrowanych zdjęć';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Brak dostępnych dat utworzenia dla aktualnie filtrowanych zdjęć';
+$lang['There are no tags available for the photos currently filtered'] = 'Brak dostępnych tagów dla aktualnie filtrowanych zdjęć';
\ No newline at end of file
diff --git a/language/pt_BR/common.lang.php b/language/pt_BR/common.lang.php
index 73194bfed..578a674dc 100644
--- a/language/pt_BR/common.lang.php
+++ b/language/pt_BR/common.lang.php
@@ -449,4 +449,9 @@ $lang['Album already selected'] = 'Álbum já selecionado';
 $lang['Click here to display it'] = 'Clique aqui para exibi-lo';
 $lang['Only the first %d albums are displayed, out of %d.'] = 'Somente os primeiros %d álbuns são exibidos, de %d.';
 $lang['Pages'] = 'Páginas';
-$lang['The PDF you requested is too large to display on this page.'] = 'O PDF solicitado é muito grande para ser exibido nesta página.';
\ No newline at end of file
+$lang['The PDF you requested is too large to display on this page.'] = 'O PDF solicitado é muito grande para ser exibido nesta página.';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Não há datas de criação disponíveis para as fotos atualmente filtradas';
+$lang['last 12 months'] = 'Últimos 12 meses';
+$lang['There are no tags available for the photos currently filtered'] = 'Não há tags disponíveis para as fotos atualmente filtradas';
+$lang['There are no authors available for the photos currently filtered'] = 'Não há autores disponíveis para as fotos atualmente filtradas';
+$lang['Custom dates'] = 'Datas personalizadas';
\ No newline at end of file
diff --git a/language/pt_PT/common.lang.php b/language/pt_PT/common.lang.php
index 7b4d7d5da..4978b080f 100644
--- a/language/pt_PT/common.lang.php
+++ b/language/pt_PT/common.lang.php
@@ -454,4 +454,7 @@ $lang['The PDF you requested is too large to display on this page.'] = 'O PDF qu
 $lang['Click here to display it'] = 'Clica aqui para o mostrar';
 $lang['Album already selected'] = 'Álbum já selecionado';
 $lang['Pages'] = 'Páginas';
-$lang['last 12 months'] = 'Últimos 12 meses';
\ No newline at end of file
+$lang['last 12 months'] = 'Últimos 12 meses';
+$lang['There are no authors available for the photos currently filtered'] = 'Não há autores disponíveis para as fotos filtradas';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Não há datas de criação disponíveis para as fotos filtradas';
+$lang['There are no tags available for the photos currently filtered'] = 'Não há tags disponíveis para as fotos filtradas';
\ No newline at end of file
diff --git a/language/sk_SK/admin.lang.php b/language/sk_SK/admin.lang.php
index a81d2e0aa..1ac5a87f1 100644
--- a/language/sk_SK/admin.lang.php
+++ b/language/sk_SK/admin.lang.php
@@ -1370,4 +1370,30 @@ $lang['Save'] = 'Uložiť';
 $lang['Select or create an album'] = 'Výber alebo vytvorenie albumu';
 $lang['System Activities'] = 'Činnosti systému';
 $lang['Who can see ?'] = 'Kto to vidí?';
-$lang['You have unsaved changes'] = 'Máte neuložené zmeny';
\ No newline at end of file
+$lang['You have unsaved changes'] = 'Máte neuložené zmeny';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Nie ste oprávnený meniť hlavného používateľa, požiadajte o to svojho správcu webu';
+$lang['You can now change the main user from %s to %s.'] = 'Teraz môžete zmeniť hlavného používateľa z %s na %s.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Heslo nemôžete skopírovať, ak pripojenie k tejto stránke nie je zabezpečené.';
+$lang['%s is the new main user'] = '%s je nový hlavný používateľ';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Na adresu "%s" bol odoslaný aktivačný odkaz platný 1 hodinu. Ak používateľ odkaz nedostane, môžete vygenerovať a skopírovať nový odkaz úpravou používateľa a správou jeho hesla.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Aktivačný odkaz platný 1 hodinu bol vytvorený, ale nepodarilo sa ho odoslať. Teraz môžete skopírovať nižšie uvedený odkaz a poslať ho používateľovi.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Tomuto používateľovi nemožno poslať e-mail, pretože nemá e-mailovú adresu';
+$lang['Changing the main user'] = 'Zmena hlavného používateľa';
+$lang['Copied link'] = 'Skopírovaný odkaz';
+$lang['Copy password'] = 'Kopírovať heslo';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Skopírujte nižšie uvedený odkaz a pošlite ho používateľovi, aby si mohol nastaviť heslo.';
+$lang['Copy the password link'] = 'Skopírujte odkaz na heslo';
+$lang['Main user'] = 'Hlavný používateľ';
+$lang['Password copied'] = 'Heslo skopírované';
+$lang['Please complete all fields'] = 'Vyplňte všetky polia';
+$lang['Resend password link'] = 'Opätovné odoslanie odkazu na heslo';
+$lang['Set as main user'] = 'Nastaviť ako hlavný používateľ';
+$lang['The passwords do not match'] = 'Heslá sa nezhodujú';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Tento používateľ musí byť najprv definovaný ako správca webu, až potom ho možno povýšiť na hlavného používateľa.';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Pre istotu prepíšte slovo "%s" nižšie';
+$lang['Username successfully modified'] = 'Úspešne upravené používateľské meno';
+$lang['Yes, let\'s proceed'] = 'Áno, pokračovať';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Chystáte sa nastaviť %s ako hlavného používateľa namiesto %s, chcete pokračovať?';
+$lang['Ok, got it!'] = 'Ok, mám to!';
+$lang['Read the release note'] = 'Prečítajte si poznámku k vydaniu';
+$lang['What\'s new in version %s'] = 'Čo je nové vo verzii %s?';
\ No newline at end of file
diff --git a/language/sk_SK/common.lang.php b/language/sk_SK/common.lang.php
index 3e1e96ea8..d59d1ff55 100644
--- a/language/sk_SK/common.lang.php
+++ b/language/sk_SK/common.lang.php
@@ -456,4 +456,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Zobrazí sa len p
 $lang['Pages'] = 'Stránky';
 $lang['The PDF you requested is too large to display on this page.'] = 'Požadované PDF je príliš veľké na zobrazenie na tejto stránke.';
 $lang['Custom dates'] = 'Vlastné termíny';
-$lang['last 12 months'] = 'Posledných 12 mesiacov';
\ No newline at end of file
+$lang['last 12 months'] = 'Posledných 12 mesiacov';
+$lang['There are no authors available for the photos currently filtered'] = 'V súčasnosti nie sú k dispozícii žiadni autori vyfiltrovaných fotografií';
+$lang['There are no creation dates available for the photos currently filtered'] = 'V súčasnosti nie sú k dispozícii žiadne dátumy vytvorenia vyfiltrovaných fotografií';
+$lang['There are no tags available for the photos currently filtered'] = 'Pre aktuálne vyfiltrované fotografie nie sú k dispozícii žiadne značky';
\ No newline at end of file
diff --git a/language/sk_SK/whats_new_15.lang.php b/language/sk_SK/whats_new_15.lang.php
new file mode 100644
index 000000000..79d0e5fe2
--- /dev/null
+++ b/language/sk_SK/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Nové rozhranie pre správu používateľov';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Úplne nové funkcie: Denníky aktivít a čítačka PDF';
+$lang['Enhanced interface for batch manager and album selector'] = 'Vylepšené rozhranie pre správcu dávok a výber albumu';
+$lang['Even more filters for the gallery search engine'] = 'Ešte viac filtrov pre vyhľadávač galérie';
\ No newline at end of file
diff --git a/language/sr_RS/admin.lang.php b/language/sr_RS/admin.lang.php
index 65df6dc2f..09c3568f6 100644
--- a/language/sr_RS/admin.lang.php
+++ b/language/sr_RS/admin.lang.php
@@ -1373,4 +1373,30 @@ $lang['Auto-update'] = 'Аутоматски ажурирај';
 $lang['Changes saved'] = 'Промене су сачуване';
 $lang['Comments allowed for sub-albums'] = 'Коментари су дозвољени за подалбуме';
 $lang['Comments disallowed for sub-albums'] = 'Коментари нису дозвољени за подалбуме';
-$lang['Core'] = 'Језгро';
\ No newline at end of file
+$lang['Core'] = 'Језгро';
+$lang['What\'s new in version %s'] = 'Шта је ново у верзији %s?';
+$lang['Yes, let\'s proceed'] = 'Да, настави';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Овим ћете поставити корисника %s као главног уместо претходног корисника %s. Да ли желите да наставите?';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Немате овлашћења да промените главног корисника, питајте уредника веб странице да то уради за вас.';
+$lang['You can now change the main user from %s to %s.'] = 'Сада можете изменити главног корисника; претходни %s, нови %s.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Не можете да копирате лозинку уколико веза до ове странице није сигурна.';
+$lang['%s is the new main user'] = '%s је нови главни корисник';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'Веза за активирање је послата на „%s“ и важиће наредних сат времена. Уколико корисник не добије везу, можете направити и копирати нову везу тако што одете на уређивање лозинки корисника.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'Веза за активирање је направљена, али није послата и важиће наредних сат времена. Можете је копирати из приложеног поља и послати кориснику.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Не могу да пошаљем е-писмо овом кориснику зато што нема адресу е-поште.';
+$lang['Changing the main user'] = 'Уређивање главног корисника';
+$lang['Copied link'] = 'Веза је копирана';
+$lang['Copy password'] = 'Копирај лозинку';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Копирајте везу која се налази испод и пошаљите је кориснику како би могао да подеси своју лозинку.';
+$lang['Copy the password link'] = 'Копирај линк за лозинку';
+$lang['Main user'] = 'Главни корисник';
+$lang['Ok, got it!'] = 'У реду, схватио сам!';
+$lang['Password copied'] = 'Лозинка је копирана';
+$lang['Please complete all fields'] = 'Попуните сва поља';
+$lang['Read the release note'] = 'Прочитај белешке о новом издању';
+$lang['Resend password link'] = 'Поново пошаљи везу';
+$lang['Set as main user'] = 'Постави као главног корисника';
+$lang['The passwords do not match'] = 'Лозинке се не поклапају';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Морате поставити корисника као уредника пре него што га унапредите у главног корисника';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Да проверимо да то заиста желите, укуцајте реч „%s“ испод';
+$lang['Username successfully modified'] = 'Корисничко име је успешно измењено';
\ No newline at end of file
diff --git a/language/sr_RS/common.lang.php b/language/sr_RS/common.lang.php
index 345cc7407..94a598226 100644
--- a/language/sr_RS/common.lang.php
+++ b/language/sr_RS/common.lang.php
@@ -451,4 +451,7 @@ $lang['Pages'] = 'Странице';
 $lang['Pre-established filters are proposed, but you can add or remove them using the "Choose filters" button.'] = 'Предложени су предодређени филтери, али их можете додати или уклонити преко дугмета „Изабери филтере“.';
 $lang['Search in :'] = 'Претражи у:';
 $lang['Custom dates'] = 'Произвољни датуми';
-$lang['last 12 months'] = 'Последњих 12 месеци';
\ No newline at end of file
+$lang['last 12 months'] = 'Последњих 12 месеци';
+$lang['There are no authors available for the photos currently filtered'] = 'Нема аутора за фотографије које су тренутно изфилтриране';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Нема датума настанка за фотографије које су тренутно изфилтриране';
+$lang['There are no tags available for the photos currently filtered'] = 'Нема ознака за фотографије које су тренутно изфилтриране';
\ No newline at end of file
diff --git a/language/sv_SE/admin.lang.php b/language/sv_SE/admin.lang.php
index 10d021a51..e6d3ce027 100644
--- a/language/sv_SE/admin.lang.php
+++ b/language/sv_SE/admin.lang.php
@@ -1371,4 +1371,30 @@ $lang['Save'] = 'Spara';
 $lang['Select or create an album'] = 'Välj eller skapa ett album';
 $lang['System Activities'] = 'Systemaktiviteter';
 $lang['Who can see ?'] = 'Vem kan se ?';
-$lang['You have unsaved changes'] = 'Du har ändringar som inte är sparade';
\ No newline at end of file
+$lang['You have unsaved changes'] = 'Du har ändringar som inte är sparade';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Du är inte behörig att ändra huvudanvändare, fråga din webmaster';
+$lang['You can now change the main user from %s to %s.'] = 'Du kan nu ändra huvudanvändaren från %s till %s.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Du kan inte kopiera lösenordet om anslutningen till denna webbplats inte är säker.';
+$lang['%s is the new main user'] = '%s är den nya huvudanvändaren';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = 'En aktiveringslänk som är giltig i 1 timme har skickats till "%s". Om användaren inte får länken kan du skapa och kopiera en ny genom att redigera användaren och hantera dennes lösenord.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = 'En aktiveringslänk giltig i 1 timme skapades men kunde inte skickas. Du kan nu kopiera länken nedan och skicka den till användaren.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'Kan ej skicka ett mejl till denna användare, för denne har ingen e-postadress';
+$lang['Changing the main user'] = 'Ändrar huvudanvändaren';
+$lang['Copied link'] = 'Kopierade länken';
+$lang['Copy password'] = 'Kopiera lösenord';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Kopiera länken nedan och skicka den till användaren så lösenordet kan sättas';
+$lang['Copy the password link'] = 'Kopiera lösenordslänken';
+$lang['Main user'] = 'Huvudanvändare';
+$lang['Password copied'] = 'Lösenord kopierat';
+$lang['Please complete all fields'] = 'Var god fyll i alla fält';
+$lang['Resend password link'] = 'Skicka om lösenordslänk';
+$lang['Set as main user'] = 'Ställ in som huvudanvändare';
+$lang['The passwords do not match'] = 'Lösenorden stämmer inte';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Denna användare måste först definieras som webmaster innan den kan uppgraderas till huvudanvändaren';
+$lang['To be sure, please rewrite the word “%s” below'] = 'För att vara säker, var god skriv ordet "%s" nedan';
+$lang['Username successfully modified'] = 'Användarnamnet har ändrats';
+$lang['Yes, let\'s proceed'] = 'Ja, låt oss fortsätta';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = 'Du är på väg att ställa in %s som huvudanvändare istället för %s, vill du fortsätta?';
+$lang['Ok, got it!'] = 'Okej, förstår!';
+$lang['Read the release note'] = 'Läs ändringsloggen';
+$lang['What\'s new in version %s'] = 'Vad är nytt i version %s?';
\ No newline at end of file
diff --git a/language/sv_SE/common.lang.php b/language/sv_SE/common.lang.php
index 2985c430b..2425ab523 100644
--- a/language/sv_SE/common.lang.php
+++ b/language/sv_SE/common.lang.php
@@ -450,4 +450,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = 'Bara de första %
 $lang['Pages'] = 'Sidor';
 $lang['The PDF you requested is too large to display on this page.'] = 'PDFen du begärde är för stor för att visas på denna sida.';
 $lang['Custom dates'] = 'Egna datum';
-$lang['last 12 months'] = 'Senaste 12 månaderna';
\ No newline at end of file
+$lang['last 12 months'] = 'Senaste 12 månaderna';
+$lang['There are no authors available for the photos currently filtered'] = 'Det finns inga författare tillgängliga för de foton som för närvarande filtreras';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Det finns inga datum för skapande för de foton som för närvarande filtreras';
+$lang['There are no tags available for the photos currently filtered'] = 'Det finns inga taggar tillgängliga för de foton som för närvarande filtreras';
\ No newline at end of file
diff --git a/language/sv_SE/whats_new_15.lang.php b/language/sv_SE/whats_new_15.lang.php
new file mode 100644
index 000000000..70980bf2e
--- /dev/null
+++ b/language/sv_SE/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Ett nytt gränssnitt för användarhantering';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Helt nya funktioner: Aktivitetsloggar och PDF-läsare';
+$lang['Enhanced interface for batch manager and album selector'] = 'Förbättrat gränssnitt för batchhanterare och albumväljare';
+$lang['Even more filters for the gallery search engine'] = 'Ännu fler filter för galleriets sökmotor';
\ No newline at end of file
diff --git a/language/tr_TR/admin.lang.php b/language/tr_TR/admin.lang.php
index 6d248acd5..4bf5157f0 100644
--- a/language/tr_TR/admin.lang.php
+++ b/language/tr_TR/admin.lang.php
@@ -1368,4 +1368,27 @@ $lang['Create a root album'] = 'Bir kök albüm oluştur';
 $lang['Changes saved'] = 'Değişiklikler kaydedildi';
 $lang['Auto-update'] = 'Otomatik güncelleme';
 $lang['An error has occured'] = 'Bir hata oluştu';
-$lang['Added on %s'] = '%s\'ye eklendi';
\ No newline at end of file
+$lang['Added on %s'] = '%s\'ye eklendi';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = 'Ana kullanıcıyı değiştirme yetkiniz yok, lütfen web yöneticinize danışın';
+$lang['You can now change the main user from %s to %s.'] = 'Artık ana kullanıcıyı %s\'den %s\'ye değiştirebilirsiniz.';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = 'Bu siteye bağlantı güvenli değilse şifreyi kopyalayamazsınız.';
+$lang['%s is the new main user'] = '%s yeni ana kullanıcıdır';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = '"%s" adresine 1 saat geçerli bir aktivasyon linki gönderildi. Kullanıcı bağlantıyı almazsa, kullanıcıyı düzenleyerek ve parolasını yöneterek yeni bir bağlantı oluşturabilir ve kopyalayabilirsiniz.';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = '1 saat geçerli bir aktivasyon bağlantısı oluşturuldu ancak gönderilemedi. Artık aşağıdaki bağlantıyı kopyalayabilir ve kullanıcıya gönderebilirsiniz.';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = 'E-posta adresi olmadığı için bu kullanıcıya e-posta gönderilemiyor';
+$lang['Changing the main user'] = 'Ana kullanıcıyı değiştirme';
+$lang['Copied link'] = 'Kopyalandı bağlantı';
+$lang['Copy password'] = 'Şifreyi kopyala';
+$lang['Copy the link below and send it to the user so the password can be set.'] = 'Aşağıdaki bağlantıyı kopyalayın ve parolanın ayarlanabilmesi için kullanıcıya gönderin.';
+$lang['Copy the password link'] = 'Parola bağlantısını kopyalayın';
+$lang['Main user'] = 'Ana kullanıcı';
+$lang['Password copied'] = 'Parola kopyalandı';
+$lang['Please complete all fields'] = 'Lütfen tüm alanları doldurun';
+$lang['Resend password link'] = 'Şifre bağlantısını yeniden gönder';
+$lang['Set as main user'] = 'Ana kullanıcı olarak ayarla';
+$lang['The passwords do not match'] = 'Şifreler eşleşmiyor';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = 'Bu kullanıcının, ana kullanıcı olarak yeni sürüme geçirilebilmesi için öncelikle web yöneticisi olarak tanımlanması gerekir';
+$lang['To be sure, please rewrite the word “%s” below'] = 'Emin olmak için lütfen aşağıdaki "%s" kelimesini yeniden yazın';
+$lang['Username successfully modified'] = 'Kullanıcı adı başarıyla değiştirildi';
+$lang['Yes, let\'s proceed'] = 'Evet, devam edelim';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = '%s yerine %s\'yi ana kullanıcı olarak ayarlamak üzeresiniz, devam etmek istiyor musunuz?';
\ No newline at end of file
diff --git a/language/tr_TR/common.lang.php b/language/tr_TR/common.lang.php
index bfd4037c9..d458bd44c 100644
--- a/language/tr_TR/common.lang.php
+++ b/language/tr_TR/common.lang.php
@@ -450,4 +450,7 @@ $lang['Pages'] = 'Sayfa';
 $lang['Click here to display it'] = 'Görüntülemek için buraya tıkla';
 $lang['Album already selected'] = 'Albüm zaten seçildi';
 $lang['Custom dates'] = 'Özel tarihler';
-$lang['last 12 months'] = 'Son 12 ay';
\ No newline at end of file
+$lang['last 12 months'] = 'Son 12 ay';
+$lang['There are no authors available for the photos currently filtered'] = 'Şu anda filtrelenen fotoğraflar için yazar bulunamadı';
+$lang['There are no creation dates available for the photos currently filtered'] = 'Şu anda filtrelenen fotoğraflar için herhangi bir oluşturma tarihi mevcut değil';
+$lang['There are no tags available for the photos currently filtered'] = 'Şu anda filtrelenen fotoğraflar için kullanılabilir etiket yok';
\ No newline at end of file
diff --git a/language/tr_TR/whats_new_15.lang.php b/language/tr_TR/whats_new_15.lang.php
new file mode 100644
index 000000000..1009d9c8f
--- /dev/null
+++ b/language/tr_TR/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['Even more filters for the gallery search engine'] = 'Galeri arama motoru için daha fazla filtre';
+$lang['Enhanced interface for batch manager and album selector'] = 'Toplu yönetici ve albüm seçici için geliştirilmiş arayüz';
+$lang['Brand new features : Activities logs and PDF reader'] = 'Yeni özellikler: Etkinlik kayıtları ve PDF okuyucu';
+$lang['A new interface for user management'] = 'Kullanıcı yönetimi için yeni arayüz';
\ No newline at end of file
diff --git a/language/vi_VN/whats_new_15.lang.php b/language/vi_VN/whats_new_15.lang.php
new file mode 100644
index 000000000..c5206e1a9
--- /dev/null
+++ b/language/vi_VN/whats_new_15.lang.php
@@ -0,0 +1,8 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = 'Giao diện mới để quản lý người dùng';
\ No newline at end of file
diff --git a/language/zh_CN/admin.lang.php b/language/zh_CN/admin.lang.php
index 3fd81fd15..a37b450fb 100644
--- a/language/zh_CN/admin.lang.php
+++ b/language/zh_CN/admin.lang.php
@@ -1377,4 +1377,30 @@ $lang['Auto-update'] = '自动更新';
 $lang['An error has occured'] = '发生了错误';
 $lang['Added on %s'] = '添加到%s';
 $lang['Add a sub-album to “%s”'] = '在“%s”中添加子相册';
-$lang['Activate create mode to create and select an album'] = '激活创建模式以创建和选择相册';
\ No newline at end of file
+$lang['Activate create mode to create and select an album'] = '激活创建模式以创建和选择相册';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = '您无权更改主用户，请联系站长。';
+$lang['You can now change the main user from %s to %s.'] = '您现在可以将主用户从 %s 更改为 %s。';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = '如果与此站点的连接不安全，您无法复制密码。';
+$lang['%s is the new main user'] = '%s是新的主用户';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = '一个有效期为1小时的激活链接已发送到"%s"。如果用户没有收到链接，您可以通过编辑用户并管理他的密码来生成并复制一个新的链接。';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = '一个有效期为1小时的激活链接已创建但无法发送。您现在可以复制以下链接并将其发送给用户。';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = '无法向此用户发送电子邮件，因为他没有电子邮件地址';
+$lang['Changing the main user'] = '更改主用户';
+$lang['Copied link'] = '链接已复制';
+$lang['Copy password'] = '复制密码';
+$lang['Copy the link below and send it to the user so the password can be set.'] = '复制以下链接并将其发送给用户，以便设置密码。';
+$lang['Copy the password link'] = '复制密码链接';
+$lang['Main user'] = '主用户';
+$lang['Password copied'] = '密码已复制';
+$lang['Please complete all fields'] = '请填写所有字段';
+$lang['Resend password link'] = '重新发送密码链接';
+$lang['Set as main user'] = '设置为主用户';
+$lang['The passwords do not match'] = '密码不匹配';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = '该用户必须先被定义站长，然后才能升级为主用户';
+$lang['To be sure, please rewrite the word “%s” below'] = '为确保无误，请在下方重新输入单词“%s”';
+$lang['Username successfully modified'] = '用户名修改成功';
+$lang['Yes, let\'s proceed'] = '是的，我们继续吧';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = '您即将将 %s 设置为主用户，而不是 %s，您确定要继续吗？';
+$lang['Ok, got it!'] = '好的，明白了！';
+$lang['Read the release note'] = '阅读发布说明';
+$lang['What\'s new in version %s'] = '版本%s中有什么新功能？';
\ No newline at end of file
diff --git a/language/zh_CN/common.lang.php b/language/zh_CN/common.lang.php
index 196e88ecd..2be2dd04d 100644
--- a/language/zh_CN/common.lang.php
+++ b/language/zh_CN/common.lang.php
@@ -453,4 +453,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = '仅显示前%d个
 $lang['The PDF you requested is too large to display on this page.'] = '您请求的PDF文件太大，无法在此页面上显示。';
 $lang['Pages'] = '页面';
 $lang['last 12 months'] = '最近12个月';
-$lang['Custom dates'] = '自定义日期';
\ No newline at end of file
+$lang['Custom dates'] = '自定义日期';
+$lang['There are no authors available for the photos currently filtered'] = '当前筛选的照片没有可用的作者信息';
+$lang['There are no creation dates available for the photos currently filtered'] = '当前筛选的照片没有可用的创建日期';
+$lang['There are no tags available for the photos currently filtered'] = '当前筛选的照片没有可用的标签';
\ No newline at end of file
diff --git a/language/zh_CN/whats_new_15.lang.php b/language/zh_CN/whats_new_15.lang.php
new file mode 100644
index 000000000..f04e0ebd2
--- /dev/null
+++ b/language/zh_CN/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = '新的用户管理界面';
+$lang['Brand new features : Activities logs and PDF reader'] = '全新功能：活动日志和PDF阅读器';
+$lang['Enhanced interface for batch manager and album selector'] = '批量管理器和相册选择器的增强界面';
+$lang['Even more filters for the gallery search engine'] = '为图库搜索引擎提供更多过滤器';
\ No newline at end of file
diff --git a/language/zh_TW/admin.lang.php b/language/zh_TW/admin.lang.php
index 46027e7f2..87b1df708 100644
--- a/language/zh_TW/admin.lang.php
+++ b/language/zh_TW/admin.lang.php
@@ -1368,4 +1368,30 @@ $lang['Save'] = '儲存';
 $lang['Select or create an album'] = '選擇或建立相簿';
 $lang['System Activities'] = '系統活動';
 $lang['Who can see ?'] = '誰可以看到？';
-$lang['You have unsaved changes'] = '您有未儲存的變更';
\ No newline at end of file
+$lang['You have unsaved changes'] = '您有未儲存的變更';
+$lang['An activation link valid for 1 hour has been sent to "%s". If the user doesn\'t receive the link, you can generate and copy a new one by editing the user and managing her password.'] = '已將啟用連結（有效期限：一小時）寄給 "%s"。如果使用者沒有收到，您可以透過編輯使用者、管理使用者的密碼，產生新的連結，再複製給使用者。';
+$lang['%s is the new main user'] = '%s 是新的主要使用者';
+$lang['An activation link valid for 1 hour was created but could not be sent. You can now copy the link below and send it to the user.'] = '啟動連結（有效時間：一小時）已建立，但無法送出。您現在可以複製以下連結，然後傳給該使用者。';
+$lang['Cannot send an email to this user because he doesn\'t have an email address'] = '無法透過 email 寄送給使用者，因為沒有該使用者的 email 地址';
+$lang['Changing the main user'] = '主要使用者變更中';
+$lang['Copied link'] = '已複製的連結';
+$lang['Copy password'] = '複製密碼';
+$lang['Copy the link below and send it to the user so the password can be set.'] = '複製下列連結，然後傳送給使用者，這樣密碼才會被設定。';
+$lang['Copy the password link'] = '複製密碼連結';
+$lang['Main user'] = '主要使用者';
+$lang['You are about to set %s as main user instead of %s, do you wish to continue ?'] = '您打算將 %s 設定為主要使用者，取代 %s。您要繼續嗎？';
+$lang['You are not authorised to change the main user, please ask your webmaster'] = '您沒有變更主要使用者的權限，請洽尋您的網站管理員';
+$lang['You can now change the main user from %s to %s.'] = '您現在可以將主要使用者由 %s 換成 %s 了。';
+$lang['You cannot copy the password if the connection to this site is not secure.'] = '您無法複製密碼，因為連接此站的通訊並不安全。';
+$lang['Ok, got it!'] = '好的，了解！';
+$lang['Password copied'] = '密碼已複製';
+$lang['Please complete all fields'] = '請將所有欄位填滿';
+$lang['Read the release note'] = '請閱讀發佈說明';
+$lang['Resend password link'] = '重送密碼連結';
+$lang['Set as main user'] = '設定為主要使用者';
+$lang['The passwords do not match'] = '密碼不符';
+$lang['This user must first be defined as the webmaster before it can be upgraded to the main user'] = '使用者必須先定義為網站管理員，才能提升為主要使用者';
+$lang['To be sure, please rewrite the word “%s” below'] = '為求確認，請再打一次下面 "%s" 這個字';
+$lang['Username successfully modified'] = '成功修改使用者名稱';
+$lang['What\'s new in version %s'] = '版本 %s 中有哪些新玩意兒？';
+$lang['Yes, let\'s proceed'] = '是的，繼續吧';
\ No newline at end of file
diff --git a/language/zh_TW/common.lang.php b/language/zh_TW/common.lang.php
index ced9bc8bc..d91dc9562 100644
--- a/language/zh_TW/common.lang.php
+++ b/language/zh_TW/common.lang.php
@@ -451,4 +451,7 @@ $lang['Only the first %d albums are displayed, out of %d.'] = '只會顯示最
 $lang['Pages'] = '頁';
 $lang['The PDF you requested is too large to display on this page.'] = '因為您所要求的 PDF 檔太大，所以無法在此頁面中顯示。';
 $lang['Custom dates'] = '個人化日期';
-$lang['last 12 months'] = '最近 12 個月';
\ No newline at end of file
+$lang['last 12 months'] = '最近 12 個月';
+$lang['There are no authors available for the photos currently filtered'] = '符合目前篩選條件的照片並無作者資訊';
+$lang['There are no creation dates available for the photos currently filtered'] = '符合目前篩選條件的照片並無建立日期資訊';
+$lang['There are no tags available for the photos currently filtered'] = '符合目前篩選條件的照片並無任何標籤';
\ No newline at end of file
diff --git a/language/zh_TW/whats_new_15.lang.php b/language/zh_TW/whats_new_15.lang.php
new file mode 100644
index 000000000..492b6f485
--- /dev/null
+++ b/language/zh_TW/whats_new_15.lang.php
@@ -0,0 +1,11 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+$lang['A new interface for user management'] = '新的使用者管理界面';
+$lang['Brand new features : Activities logs and PDF reader'] = '全新功能：活動記錄以及 PDF 閱讀器';
+$lang['Enhanced interface for batch manager and album selector'] = '更新批次動作管理員和相簿選擇器的使用介面';
+$lang['Even more filters for the gallery search engine'] = '增加更多藝廊搜尋引擎的篩選條件';
\ No newline at end of file