Basically when you create your account, you need a chinese ID, and you have to use the name on the ID or your account won't be valid.
They have forms on the customer support section who should allow you to rectify this.
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