po: missing or incorrect language codes

po/ach.po

@@ -1329,7 +1329,7 @@ msgstr ""
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr ""
+msgstr "ach"
 
 #: src/libvlc.c:861
 msgid ""

po/af.po

@@ -1325,7 +1325,7 @@ msgstr "Gebare"
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr "C"
+msgstr "af"
 
 #: src/libvlc.c:861
 msgid ""

po/am.po

@@ -1327,7 +1327,7 @@ msgstr ""
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr ""
+msgstr "am"
 
 #: src/libvlc.c:861
 msgid ""

po/cgg.po

@@ -1317,7 +1317,7 @@ msgstr ""
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr ""
+msgstr "cgg"
 
 #: src/libvlc.c:861
 msgid ""

po/ff.po

@@ -1327,7 +1327,7 @@ msgstr ""
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr ""
+msgstr "ff"
 
 #: src/libvlc.c:861
 msgid ""

po/lg.po

@@ -1328,7 +1328,7 @@ msgstr ""
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr ""
+msgstr "lg"
 
 #: src/libvlc.c:861
 msgid ""

po/te.po

@@ -1292,7 +1292,7 @@ msgstr ""
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr "C"
+msgstr "te"
 
 #: src/libvlc.c:861
 msgid ""

po/zh_CN.po

@@ -1353,7 +1353,7 @@ msgstr "鼠标手势"
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr "C"
+msgstr "zh_CN"
 
 #: src/libvlc.c:861
 msgid ""

po/zu.po

@@ -1328,7 +1328,7 @@ msgstr ""
 #. xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"...
 #: src/libvlc.c:291
 msgid "C"
-msgstr ""
+msgstr "zu"
 
 #: src/libvlc.c:861
 msgid ""