I am living in China (Shanghai), and last month finally got a computer good enough to play Starcraft 2 (it has been quite a wait). I bought it on the European store and played through the campaign.
I just started messing around with multiplayer, and it looks as if I can play on the Taiwan/Korean server ok, though it's a touch laggy.
My Mandarin is reasonable, and I'd like to now play the game in Chinese - it would be fun and great practice. But I can't read traditional characters, and for the life of me do not seem to be able to find a way to change it to simplified, beyond buying a separate Chinese copy of the game. It looks like there used to be a relocalization program, but it appears out of date.
If there's a work around, I'd love to know. 多谢!