Default Language in Roundcube

Hi everybody,

I'm using Roundcube and I have a problem with the default language. I know that I can change manually the default language, but I want do it by a default initial session. I use phpmyadmin and I see that in user's table there's a attribute called Language. When I change this attribute (in a user that exists) manually in the database to ca for example, the language session change to catalan. But when I change the default valour to ca, the default language in a initial session for a new user continous in English.

Can somebody please tell me if there's a solution for this problem.

Thanks a lot!