CMS 2002 actually has a pretty good story in regards to multiple language support.  I'd be interested to hear your experiences with CMS and multiple languages.  I've worked with a few customers on this, and the perception still remains that CMS 2002 is weak in this area.  Here are a few items on the subject.  Please feel free to comment about your experience or situation.

MCMS supports Unicode and UTF8. The site the end user sees and the web author console are completely localizable.
 
CMS 2002 SP1a supports English, French, German and Japanese for the core product.  This means all documentation, administrative screens, etc.  (sorry, no Spanish and no Chinese)

CMS 2002 SP1a authoring connector for word supports:
Simplified Chinese, Traditional Chinese, Dutch, English, French, German, Italian, Japanese, Korean, Portuguese (Brazil), Spanish, and Swedish

There is a whitepaper on creating multilingual websites posted at http://www.gotdotnet.com/team/wsservers/mcms/MultiLing.zip. Excellent whitepaper with sample code.
 
A good case study to take a look at is Volvo available at http://www.microsoft.com/resources/casestudies/search.asp?ProTaxID=1266