I'm open to other languages, but not to forbid english !
I don't like the request to allow ONLY Chinese readers in the group.
Look at the Japanese group, it's not ONLY Japanese, it's allowing others to come and read, and learn and exchange, and ask questions in English, ask for translations, ask for knowledge and language learning, etc.
There could be dedicated Chinese discussions (for non english speakers who want help on hacking or emulation or technology,
tutorial, or anything else as the forum is open to any subjects), and others where english is also accepted.
GBAtemp is a shared place in my opinion. English was decided to allow more people to come here and communicate (imagine if GBAtemp was Italian only because its founder, KiVan, is Italian...)
groups dedicated to other languages shouldn't be locked and forbidden to the majority or the forum's identity. This place is about community and sharing, not closed and hidden (or else, just go to another website to hide what you write so nobody from here will read it)