@newt - this will propably the last thing I will say to that matter:
Haveing "unmoderated" languages on a internationaly used platform, that is hosted within the EU can bear dramatic legal issues. Let me give you a little example: Due to our history, the are some things that are seen as sedition here in Germany. Now, if there's a site, that is unable to understand what I post, and I could use this site, to pass on information to other "illegal" subjects in an easy way. This may all be no problem, if the company behind the site is outside the EU, but Scirra isn't.
Now, one could say, this is highly theoretical - maybe, but out of professional experience I advise anyone in charge, to not even have any doubt occur that the site is "clean".
In addition, you are talking about community. In my mind community counts all useres of a board and not only a subset. I question, why are there "local" boards an even a thread refering to them, if this international community drifts appart? If all the posted tutorials would be in the native language of the author, all lot of information would be kept from all the people not able to read that language. English as a very good common language to share information.
Last but not least, I personaly think it is inpolite to use any other language then english on an international used board, but I understand, that my very conservative mind may be a problem to the "young" - I am "old" I know that, but I also have the full internet experience, ie. I have been "playing" with BBS long before the Internet was commodity or even known as such.
May Ashley and Tom do what they like....