diff --git a/plugins/admin_multi_view/language/vi_VN/description.txt b/plugins/admin_multi_view/language/vi_VN/description.txt
new file mode 100644
index 000000000..242d2d722
--- /dev/null
+++ b/plugins/admin_multi_view/language/vi_VN/description.txt
@@ -0,0 +1 @@
+Cho phép Quản trị viên xem thư viện hình như một tài khoản khách và/hoặc thay đổi ngôn ngữ hiển thị và/hoặc giao diện trong thời gian ghé vào thư viện hình. Rất thiết thực cho việc thay đổi những hiệu chỉnh...
\ No newline at end of file
diff --git a/plugins/admin_multi_view/language/vi_VN/index.php b/plugins/admin_multi_view/language/vi_VN/index.php
new file mode 100644
index 000000000..17747c927
--- /dev/null
+++ b/plugins/admin_multi_view/language/vi_VN/index.php
@@ -0,0 +1,30 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based picture gallery                                  |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2010 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.                                                                  |
+// +-----------------------------------------------------------------------+
+
+// Recursive call
+$url = '../';
+header( 'Request-URI: '.$url );
+header( 'Content-Location: '.$url );
+header( 'Location: '.$url );
+exit();
+?>
diff --git a/plugins/c13y_upgrade/language/vi_VN/description.txt b/plugins/c13y_upgrade/language/vi_VN/description.txt
new file mode 100644
index 000000000..47d005220
--- /dev/null
+++ b/plugins/c13y_upgrade/language/vi_VN/description.txt
@@ -0,0 +1 @@
+Kiểm tra tính nguyên vẹn của bản nâng cấp.
\ No newline at end of file
diff --git a/plugins/c13y_upgrade/language/vi_VN/index.php b/plugins/c13y_upgrade/language/vi_VN/index.php
new file mode 100644
index 000000000..17747c927
--- /dev/null
+++ b/plugins/c13y_upgrade/language/vi_VN/index.php
@@ -0,0 +1,30 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based picture gallery                                  |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2010 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.                                                                  |
+// +-----------------------------------------------------------------------+
+
+// Recursive call
+$url = '../';
+header( 'Request-URI: '.$url );
+header( 'Content-Location: '.$url );
+header( 'Location: '.$url );
+exit();
+?>
diff --git a/plugins/c13y_upgrade/language/vi_VN/plugin.lang.php b/plugins/c13y_upgrade/language/vi_VN/plugin.lang.php
new file mode 100644
index 000000000..5ea7437f7
--- /dev/null
+++ b/plugins/c13y_upgrade/language/vi_VN/plugin.lang.php
@@ -0,0 +1,31 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based picture gallery                                  |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2010 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.                                                                  |
+// +-----------------------------------------------------------------------+
+
+// --------- Starting below: New or revised $lang ---- from Butterfly (1.8)
+$lang['c13y_upgrade_no_anomaly'] = 'Không có sự bất thường nào được phát hiện sau khi nâng cấp ứng dụng, plugin "Dò tìm bản nâng cấp" đã được tắt.';
+$lang['c13y_dbl_email_user'] = 'Người dùng có cùng địa chỉ email';
+$lang['c13y_correction_dbl_email_user'] = 'Xóa các người dùng có trùng tên';
+$lang['c13y_obsolete_plugin'] = 'Plugin lỗi thời';
+$lang['c13y_correction_obsolete_plugin'] = '"%s" plugin đã được kèm theo trong phiên bản của ứng dụng này và bạn bắt buộc phải gỡ bỏ nó ra.';
+
+?>
\ No newline at end of file
diff --git a/plugins/language_switch/language/vi_VN/description.txt b/plugins/language_switch/language/vi_VN/description.txt
new file mode 100644
index 000000000..0119bddf5
--- /dev/null
+++ b/plugins/language_switch/language/vi_VN/description.txt
@@ -0,0 +1 @@
+Chuyển sang ngôn ngữ khác từ biểu tượng lá cờ trên trang chủ Thư viện hình của bạn.
\ No newline at end of file
diff --git a/plugins/language_switch/language/vi_VN/index.php b/plugins/language_switch/language/vi_VN/index.php
new file mode 100644
index 000000000..17747c927
--- /dev/null
+++ b/plugins/language_switch/language/vi_VN/index.php
@@ -0,0 +1,30 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based picture gallery                                  |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2010 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.                                                                  |
+// +-----------------------------------------------------------------------+
+
+// Recursive call
+$url = '../';
+header( 'Request-URI: '.$url );
+header( 'Content-Location: '.$url );
+header( 'Location: '.$url );
+exit();
+?>