I did a little debug and find a bug in the admin setting
If I have more than 2 languages, say en/fr/zh, when I try to create different welcome message for different lang, end up it will never save the last languages.
E.g.
en -> welcome !
fr -> bon jour !
zh -> abcderf !
after saving in admin module, database will hold the following value:
en -> welcome !
fr -> bon jour !
zh -> bon jour !
