Hi,
Specific language based forums are hard to control because of obvious moderating limitations.
Nevertheless, I think that some will benefit a lot with a specific place to ask questions in their natural language. Those would be placed forums under a main category named Multilanguage, with subforums per language - this way any topic can be discussed here - complicated to manage, but as English will continue to be the main language there probably shouldn't be many problems.
So, here's a poll to start the discussion on which languages should be covered.