I see the goal is to have threads in multiple languages (other than English). Unfortunately most people can speak a limited set of languages and probably will not benefit at all of trying to read posts/threads in languages that they don't understand. I see that some posts may be interesting enough that one may want to take on the challenge to try to translate but this won't be norm.
It would be very helpful to have a indicator of the "main" language of the thread anywhere the thread or the posts are listed.
This is by no means an attempt of suggesting that we should only have posts in English. Of course posting in English will probably bring the most number of people to the discussion.