merge --squash from translation up to f9fecd0be0

git merge --squash is simpler for the first time, then we plan to do cherry-pick

language/zh_CN/common.lang.php

@@ -428,4 +428,5 @@ $lang['Photo description'] = '相片描述';
 $lang['Photo title'] = '相片标题';
 $lang['Album name, A → Z'] = '相册名称， A → Z';
 $lang['Album name, Z → A'] = '相册名称， Z → A';
-$lang['Link: %s'] = '链接： %s';
+$lang['Link: %s'] = '链接： %s';
+$lang['Your authentication key is no longer valid.'] = '您的认证密钥已失效。';