Oops, sorry for the bad explanation but I was in a little bit of hurry. I mean some subforums in other languages, like Dutch, German, Italian, French, etc. So we can talk our mother language to people from the same country.
Sometimes there are some local deals, a meeting that we want to share etc.
I hope this is more clear than the previous question.
Here is an example: http://www.websitebaker.org/forum
(a forum about a Content Management System)
As you can see, there is the normal forum in English. Below you see the other languages. The English language does contain the most part. The foreign languages have fewer subforums.