A few months ago several MVP's joined together in a new community project on Codeplex.  This project is called TSWA Community Translation Project.

The purpose of this project is to give the community some additional languages for TSWA above the 9 that already ships with the product.

You can read the full story here : http://blogs.infosupport.com/marcelv/archive/2008/11/17/First-release-of-Team-System-Web-Access-Translations-now-available_2100_.aspx