Displaying the same language as the parent page

[Migrated From Jforum.net]

I'm looking for a solution for inserting a forum inside a portal. I have learned that headers and footers could be integrated using iframes. I suppose that colours and fonts are easy to change with the CSS's.
But what should I do if I need to change the default displaying language depending on what language the user has defined in the portal?

Thanks a lot!
[originally posted on jforum.net by dcuenca]

[Migrated From Jforum.net]

He should have the language stored in the jforum_users table, user_lang column.

Rafael
[originally posted on jforum.net by Rafael Steil]