I checked out the WordPress Bible, typing "language" into the Search function and got an overwhelming response.
It looks like WordPress supports a number of languages, including French and Japanese, but I don't understand where to access the complete list. I'm especially interested in Chinese, Thai and perhaps a few other Asian languages.
(However, I'm not requesting INSTRUCTIONS in Chinese! I'll never be able to figure anything out if the directions and PHP code are all in a foreign tongue. :)