u don t need to buy the game in china, just put credits and u can play.
Otherwise besides everyone around speaking chinese everything is all cool and fine.
When you log on a realm type "/join english
" to get in touch with the community members.
WoW English/Chinese glossary
(2000+ translated words) found on wow-in-chinese.jfs-web.chEnglish speakers are consolidating on the same realm for Cataclysm check this thread