Associate languages to (sub)forums

Hi,
using the core forum module, I find that even installing internationalization modules it is not possible to associate language to a forum.

My idea is to create some forums in English, like "Green Bananas in US", "Green bananas in UK" plus having some forums in Spanish, like "Bananas verdes en España", "Bananas verdes en Guatemala". I want that, depending on the language the user has selected, they can see forums on their language only.
Do I need a special module to allow that?
Thanks a lot