diff --git a/lang/croatian-win1250.inc.php3 b/lang/croatian-windows-1250.inc.php3
similarity index 100%
rename from lang/croatian-win1250.inc.php3
rename to lang/croatian-windows-1250.inc.php3
diff --git a/lang/danish.inc.php3 b/lang/danish-iso-8859-1.inc.php3
similarity index 100%
rename from lang/danish.inc.php3
rename to lang/danish-iso-8859-1.inc.php3
diff --git a/lang/sync_lang.sh b/lang/sync_lang.sh
index 77c23fd51..ce9b7edca 100755
--- a/lang/sync_lang.sh
+++ b/lang/sync_lang.sh
@@ -21,8 +21,8 @@ catalan-iso-8859-1
 chinese_big5
 chinese_gb
 croatian-iso8859-2
-czech-iso
-danish
+czech-iso-8859-2
+danish-iso-8859-1
 dutch
 english
 estonian
diff --git a/libraries/select_lang.lib.php3 b/libraries/select_lang.lib.php3
index dc2b14cb5..b903b1567 100644
--- a/libraries/select_lang.lib.php3
+++ b/libraries/select_lang.lib.php3
@@ -44,9 +44,9 @@ $available_languages = array(
     'bg-win1251'   => array('bg|bulgarian', 'bulgarian-windows-1251', 'bg'),
     'bg-koi8-r'    => array('bg|bulgarian', 'bulgarian-koi8-r', 'bg'),
     'ca-iso-8859-1'=> array('ca|catalan', 'catalan-iso-8859-1', 'ca'),
-    'cs-iso'       => array('cs|czech', 'czech-iso', 'cs'),
+    'cs-iso-8859-2'=> array('cs|czech', 'czech-iso-8859-2', 'cs'),
     'cs-utf-8'     => array('cs|czech', 'czech-utf-8', 'cs'),
-    'cs-win1250'   => array('cs|czech', 'czech-win1250', 'cs'),
+    'cs-win1250'   => array('cs|czech', 'czech-windows-1250', 'cs'),
     'da'           => array('da|danish', 'danish', 'da'),
     'de'           => array('de([-_][[:alpha:]]{2})?|german', 'german', 'de'),
     'de-utf-8'     => array('de([-_][[:alpha:]]{2})?|german', 'german-utf-8', 'de'),