Language translation

You need to create a .mo (or .po) file from the template called WordPress1.2POT.
All the info is in the Wiki, (wiki.wordpress.org), just search for “l10n” or “localization”.
You will probably also need a tool like poEdit or similar. I just downloaded poEdit from SourceForge and used it for the first time today. It was really easy to install and learn.
I’m sure people would be happy if you make the .mo file available to others when you are done, and they will be happy to support you if you need!