diff --git a/language/en_GB/upgrade.lang.php b/language/en_GB/upgrade.lang.php
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+++ b/language/en_GB/upgrade.lang.php
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+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based photo gallery                                    |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2016 Piwigo Team                  http://piwigo.org |
+// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
+// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
+// +-----------------------------------------------------------------------+
+// | This program is free software; you can redistribute it and/or modify  |
+// | it under the terms of the GNU General Public License as published by  |
+// | the Free Software Foundation                                          |
+// |                                                                       |
+// | This program is distributed in the hope that it will be useful, but   |
+// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
+// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
+// | General Public License for more details.                              |
+// |                                                                       |
+// | You should have received a copy of the GNU General Public License     |
+// | along with this program; if not, write to the Free Software           |
+// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
+// | USA.                                                                  |
+// +-----------------------------------------------------------------------+
+$lang['All sub-albums of private albums become private'] = 'All sub-albums of private albums become private';
+$lang['As a precaution, following plugins have been deactivated. You must check for plugins upgrade before reactiving them:'] = 'As a precaution, the following plugins have been deactivated. You must check for upgradable plugins before reactivating them:';
+$lang['As a precaution, following themes have been deactivated. You must check for themes upgrade before reactiving them:'] = 'As a precaution, the following themes have been deactivated. You must check for upgradable themes before reactivating them:';
+$lang['Discover what\'s new in Piwigo %s'] = 'Discover what\'s new in Piwigo %s';
+$lang['In <i>%s</i>, before <b>?></b>, insert:'] = 'In <i>%s</i>, before <b>?></b>, insert:';
+$lang['Only administrator can run upgrade: please sign in below.'] = 'Only an administrator can run an upgrade: please sign in below.';
+$lang['Only thumbnails prefix and webmaster mail address have been saved from previous configuration'] = 'Only thumbnails prefix and webmaster mail address have been saved from previous configuration';
+$lang['Perform a maintenance check in [Administration>Tools>Maintenance] if you encounter any problem.'] = 'Perform a maintenance check in [Administration>Tools>Maintenance] if you encounter any problem.';
+$lang['SQL queries'] = 'SQL queries';
+$lang['Statistics'] = 'Statistics';
+$lang['This page proposes to upgrade your database corresponding to your old version of Piwigo to the current version. The upgrade assistant thinks you are currently running a <strong>release %s</strong> (or equivalent).'] = 'This page proposes to upgrade the database from your old Piwigo version to the new version. The upgrade assistant thinks you are currently running <strong>release %s</strong> (or equivalent).';
+$lang['Upgrade'] = 'Upgrade';
+$lang['Upgrade from version %s to %s'] = 'Upgrade from version %s to %s';
+$lang['Upgrade informations'] = 'Upgrade information';
+$lang['User permissions and group permissions have been erased'] = 'Users and groups permissions have been erased';
+$lang['You do not have access rights to run upgrade'] = 'You do not have access rights to run upgrade';
+$lang['total SQL time'] = 'total SQL time';
+$lang['total upgrade time'] = 'total upgrade time';
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