diff --git a/ChangeLog b/ChangeLog
index 7951b4dc5f..c4161b8cb9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -22,6 +22,7 @@ phpMyAdmin - ChangeLog
 - bug #3897 Row Statistics and Space usage bugs
 - bug #3966 Only display "table has no unique column" message when applicable
 - bug #3960 NavigationBarIconic config not honored
+- bug #3965 Default language wrong with zh-TW
 
 4.0.3.0 (2013-06-05)
 - bug #3941 Recent tables list always empty
diff --git a/libraries/select_lang.lib.php b/libraries/select_lang.lib.php
index b11e28d0f4..a14f5e897c 100644
--- a/libraries/select_lang.lib.php
+++ b/libraries/select_lang.lib.php
@@ -340,7 +340,13 @@ function PMA_langDetails($lang)
     case 'zh_TW':
         return array('zh[-_](tw|hk)|chinese traditional', 'zh-TW', '中文');
     case 'zh_CN':
-        return array('zh|chinese simplified', 'zh', '中文');
+        // only TW and HK use traditional Chinese while others (CN, SG, MY)
+        // use simplified Chinese
+        return array(
+            'zh(?![-_](tw|hk))([-_][[:alpha:]]{2,3})?|chinese simplified', 
+            'zh', 
+            '中文'
+        );
     }
     return array("$lang|$lang", $lang, $lang);
 }