diff --git a/po/ar.po b/po/ar.po
index 67d4501e97..eb4885ef35 100644
--- a/po/ar.po
+++ b/po/ar.po
@@ -11,7 +11,7 @@ msgstr ""
 "PO-Revision-Date: 2010-03-21 22:45+0200\n"
 "Last-Translator: Mohamed Magdy <theblackdragon_100@hotmail.com>\n"
 "Language-Team: LyX team <theblackdragon_100@hotmail.com>\n"
-"Language: \n"
+"Language: ar\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/ca.po b/po/ca.po
index fb95e23ae5..cabdc75ab7 100644
--- a/po/ca.po
+++ b/po/ca.po
@@ -21,7 +21,7 @@ msgstr ""
 "PO-Revision-Date: 2008-07-28 17:53+0100\n"
 "Last-Translator: joan <joan@montane.cat>\n"
 "Language-Team: Catalan\n"
-"Language: \n"
+"Language: ca\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/el.po b/po/el.po
index 704c88d7c2..338c86d24c 100644
--- a/po/el.po
+++ b/po/el.po
@@ -10,7 +10,7 @@ msgstr ""
 "PO-Revision-Date: 2010-07-07 02:31+0100\n"
 "Last-Translator: Οδυσσέας Δαγκλής <o2d@freemail.gr>\n"
 "Language-Team: LyX team <lyx-docs@lists.lyx.org>\n"
-"Language: \n"
+"Language: el\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/en.po b/po/en.po
index 87ca57a125..30456a19fe 100644
--- a/po/en.po
+++ b/po/en.po
@@ -9,7 +9,7 @@ msgstr ""
 "PO-Revision-Date: 2008-08-04 17:40+0100\n"
 "Last-Translator: Uwe Stöhr <uwestoehr@web.de>\n"
 "Language-Team: LyX team <lyx-docs@lists.lyx.org>\n"
-"Language: \n"
+"Language: en\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/es.po b/po/es.po
index 09959c16f0..83dfc30471 100644
--- a/po/es.po
+++ b/po/es.po
@@ -14,7 +14,7 @@ msgstr ""
 "PO-Revision-Date: 2010-09-21 13:08+0100\n"
 "Last-Translator: Ignacio García <ignacio.gmorales@gmail.com>\n"
 "Language-Team: LyX team <lyx-docs@lists.lyx.org>\n"
-"Language: \n"
+"Language: es\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/fr.po b/po/fr.po
index efe22f51ff..bec401d206 100644
--- a/po/fr.po
+++ b/po/fr.po
@@ -255,7 +255,7 @@ msgstr ""
 "PO-Revision-Date: 2010-11-04 13:12+0100\n"
 "Last-Translator: Jean-Pierre Chrétien <jeanpierre.chretien@free.fr>\n"
 "Language-Team: lyxfr\n"
-"Language: \n"
+"Language: fr\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/hu.po b/po/hu.po
index 3acbdb269b..a3c7b756fd 100644
--- a/po/hu.po
+++ b/po/hu.po
@@ -8,7 +8,7 @@ msgstr ""
 "PO-Revision-Date: 2010-04-22 22:53+0100\n"
 "Last-Translator: Szőke Sándor <alex@lyx.hu>\n"
 "Language-Team: LyX-hu <alex@lyx.hu>\n"
-"Language: \n"
+"Language: hu\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/id.po b/po/id.po
index 9b622d1af0..e86b9ea70a 100644
--- a/po/id.po
+++ b/po/id.po
@@ -11,7 +11,7 @@ msgstr ""
 "PO-Revision-Date: 2010-10-28 01:31+0100\n"
 "Last-Translator: Waluyo Adi Siswanto <was.uthm@gmail.com>\n"
 "Language-Team: \n"
-"Language: \n"
+"Language: id\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/it.po b/po/it.po
index 3102f7ccd8..7c3f72fe02 100644
--- a/po/it.po
+++ b/po/it.po
@@ -10,7 +10,7 @@ msgstr ""
 "PO-Revision-Date: 2010-10-20 16:21+0100\n"
 "Last-Translator: Enrico Forestieri <forenr@lyx.org>\n"
 "Language-Team: italiano <it@li.org>\n"
-"Language: \n"
+"Language: it\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/ja.po b/po/ja.po
index deb73dcf92..6cd9054406 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -11,7 +11,7 @@ msgstr ""
 "PO-Revision-Date: 2010-08-26 12:32+0900\n"
 "Last-Translator: Koji Yokota <yokota@res.otaru-uc.ac.jp>\n"
 "Language-Team: 日本語 <lyx-doc@lists.lyx.org>\n"
-"Language: \n"
+"Language: ja\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/ko.po b/po/ko.po
index 448cd9a8a3..f532e3a00f 100644
--- a/po/ko.po
+++ b/po/ko.po
@@ -10,7 +10,7 @@ msgstr ""
 "PO-Revision-Date: 2007-05-15 16:13+0900\n"
 "Last-Translator: cghan <cghan@pusan.ac.kr>\n"
 "Language-Team: hangul <ko@li.org>\n"
-"Language: \n"
+"Language: ko\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/nb.po b/po/nb.po
index efffbe79a9..206dc6c64a 100644
--- a/po/nb.po
+++ b/po/nb.po
@@ -10,7 +10,7 @@ msgstr ""
 "PO-Revision-Date: 2009-08-19 17:52+0100\n"
 "Last-Translator: Helge Hafting <helge.hafting@aitel.hist.no>\n"
 "Language-Team: norsk <no@li.org>\n"
-"Language: \n"
+"Language: nb\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/nn.po b/po/nn.po
index aa2482c8c7..149c37fc45 100644
--- a/po/nn.po
+++ b/po/nn.po
@@ -12,7 +12,7 @@ msgstr ""
 "PO-Revision-Date: 2007-06-26 17:52+0100\n"
 "Last-Translator: Ingar Pareliussen <ingarp_ved@samfundet.no>\n"
 "Language-Team: Nynorsk <nn@li.org>\n"
-"Language: \n"
+"Language: nn\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/pl.po b/po/pl.po
index b9f6242902..3f4d4668ba 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -18,7 +18,7 @@ msgstr ""
 "PO-Revision-Date: 2010-08-16 22:45+0100\n"
 "Last-Translator: MIchał Fita <michal.fita@gmail.com>\n"
 "Language-Team: Polski <pl@li.org>\n"
-"Language: \n"
+"Language: pl\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/pt.po b/po/pt.po
index 344a05c679..270c77e361 100644
--- a/po/pt.po
+++ b/po/pt.po
@@ -13,7 +13,7 @@ msgstr ""
 "PO-Revision-Date: 2009-08-19 17:17+0100\n"
 "Last-Translator: susana barbosa <sabarbosa@fc.ul.pt>\n"
 "Language-Team: American English <kde-i18n-doc@kde.org>\n"
-"Language: \n"
+"Language: pt\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/sk.po b/po/sk.po
index c2b8c6f811..2cd4d52c3a 100644
--- a/po/sk.po
+++ b/po/sk.po
@@ -12,7 +12,7 @@ msgstr ""
 "PO-Revision-Date: 2010-10-20 07:24+0200\n"
 "Last-Translator: Kornel Benko <kornel@lyx.org>\n"
 "Language-Team: Slovenčina <lyx-docs@lists.lyx.org>\n"
-"Language: \n"
+"Language: sk\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/wa.po b/po/wa.po
index ccb5a9c801..b966404582 100644
--- a/po/wa.po
+++ b/po/wa.po
@@ -14,7 +14,7 @@ msgstr ""
 "PO-Revision-Date: 2005-12-18 15:04+0100\n"
 "Last-Translator: Lorint Hendschel <>\n"
 "Language-Team: walon <linux-wa@chanae.alphanet.ch>\n"
-"Language: \n"
+"Language: wa\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/zh_CN.po b/po/zh_CN.po
index a5c754ca6d..fbba1b110c 100644
--- a/po/zh_CN.po
+++ b/po/zh_CN.po
@@ -13,7 +13,7 @@ msgstr ""
 "PO-Revision-Date: 2009-10-18 22:58+0000\n"
 "Last-Translator: mgc <mgcgogo@gmail.com>\n"
 "Language-Team: 简体中文 <lyx-docs@lists.lyx.org>\n"
-"Language: \n"
+"Language: zh_CN\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"