I think it would be a nice idea to create a forum section just for Chinese (or any other language really), so that they can discuss CEGUI issues there. If anyone able to write Chinese is reading this, PM me so we can arrange that (we definitely need someone to moderate that section - I can't read Chinese without Google translator

There are also many German visitors (~10%), however I think English is more comfortable for most Germans than it is for most Chinese. French visitors are at ~6%.
Feel free to post any opinions about this. On one hand it splits the knowledge base into 2 or even more chunks, plus we can't reply because we won't be able to read/write Chinese. On the other hand it could help some users considerably.