If you are talking about the language of the User Interface, then MS have made Multiligual User Interface. MUI's are installed on top of an ENGLISH installation of Windows XP. So for your chinese XP you're out of luck.
For smaller regions / minorities, MS has created LIPs, Language Interface Packs. These don't translate as much as the MUI's do, but will help you on your way.
You cannot change the interface language from a default Windows XP installation. YOu need the MUI packs. They can be found on the Technet CDs.
BTW... I noticed your first post... Welcome to MSFN.
Also, if you want to read up on MUI's and LIP's you might want to check this page:
http://www.microsoft...ce/muizone.mspx
You can actually install as many MUIs as you like and allow the end users to select the interface language. Great if your deploying Windows in a business environment across country borders.
This post has been edited by enuffsaid: 09 February 2007 - 11:20 AM