diff --git a/helpers/Data.php b/helpers/Data.php
index 1d054f3..57cbf52 100644
--- a/helpers/Data.php
+++ b/helpers/Data.php
@@ -25,6 +25,8 @@ public static function cache($key, $duration, $callable)
 
     public static function getLocale()
     {
-        return strtolower(substr(Yii::$app->language, 0, 2));
+        $muti_lan_array=['zh-cn','zh-tw'];
+		$language=strtolower(trim(Yii::$app->language));
+        return in_array($language,$muti_lan_array,false)?$language:substr($language, 0, 2); 
     }
-}
\ No newline at end of file
+}