[easytag] Add Language headers to po files

[Piotr Drąg <piotrdrag src gnome org>]

commit 833798088681db64cc0fce642534ee38090646a7
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Fri Jul 15 19:09:10 2016 +0200

    Add Language headers to po files
    
    Future versions of gettext will fail if this header is missing.

 po/es.po       |    2 +-
 po/nb.po       |    2 +-
 po/ru.po       |    2 +-
 po/sl.po       |    2 +-
 po/sr latin po |    2 +-
 po/zh_CN.po    |    2 +-
 po/zh_TW.po    |    2 +-
 7 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/po/es.po b/po/es.po
index b414407..494b220 100644
--- a/po/es.po
+++ b/po/es.po
@@ -18,7 +18,7 @@ msgstr ""
 "PO-Revision-Date: 2016-01-07 15:19+0100\n"
 "Last-Translator: Daniel Mustieles <daniel mustieles gmail com>\n"
 "Language-Team: Español; Castellano <gnome-es-list gnome 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/nb.po b/po/nb.po
index da168b2..c9ec4c3 100644
--- a/po/nb.po
+++ b/po/nb.po
@@ -11,7 +11,7 @@ msgstr ""
 "PO-Revision-Date: 2015-09-07 22:24+0200\n"
 "Last-Translator: Åka Sikrom <a4 hush com>\n"
 "Language-Team: Norwegian bokmål\n"
-"Language: Norwegian bokmål\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/ru.po b/po/ru.po
index d504671..9db969a 100644
--- a/po/ru.po
+++ b/po/ru.po
@@ -12,7 +12,7 @@ msgstr ""
 "PO-Revision-Date: 2013-03-08 15:37+0300\n"
 "Last-Translator: Stas Solovey <whats_up tut by>\n"
 "Language-Team: Russian <gnome-cyr gnome org>\n"
-"Language: \n"
+"Language: ru\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/sl.po b/po/sl.po
index cfc2996..e630a4d 100644
--- a/po/sl.po
+++ b/po/sl.po
@@ -14,7 +14,7 @@ msgstr ""
 "PO-Revision-Date: 2014-04-12 18:57+0100\n"
 "Last-Translator: Matej Urbančič <mateju svn gnome org>\n"
 "Language-Team: Slovenian GNOME Translation Team <gnome-si googlegroups com>\n"
-"Language: sl_SI\n"
+"Language: sl\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/sr latin po b/po/sr latin po
index d4d87fc..c4d15d4 100644
--- a/po/sr latin po
+++ b/po/sr latin po
@@ -13,7 +13,7 @@ msgstr ""
 "PO-Revision-Date: 2015-12-29 09:24+0200\n"
 "Last-Translator: Miroslav Nikolić <miroslavnikolic rocketmail com>\n"
 "Language-Team: Serbian <gnom prevod org>\n"
-"Language: sr\n"
+"Language: sr@latin\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 aed448c..bc2dd4e 100644
--- a/po/zh_CN.po
+++ b/po/zh_CN.po
@@ -13,7 +13,7 @@ msgstr ""
 "PO-Revision-Date: 2007-10-25 18:58+0800\n"
 "Last-Translator: Yang Jinsong <shannleon gmail com>\n"
 "Language-Team: Simplified Chinese\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"
diff --git a/po/zh_TW.po b/po/zh_TW.po
index 57d60b7..94cb523 100644
--- a/po/zh_TW.po
+++ b/po/zh_TW.po
@@ -11,7 +11,7 @@ msgstr ""
 "PO-Revision-Date: 2007-09-25 20:57+0800\n"
 "Last-Translator: Jose Sun <josesun gmail com>\n"
 "Language-Team: \n"
-"Language: \n"
+"Language: zh_TW\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"