The Mozilla Localisation Project provides these services. There's also a localised Mozilla community and discussion group which uses many languages to discuss Mozilla development issues. Before we get to more specifics on the Mozilla project itself, however, I have a few general thoughts on implementing a web site for international audiences. Designing your web pages to be internationally friendly Let's take a few moments to talk about creating web pages for an international audience. Personally, I'm not fond of sites that have flags to denote links to localised versions of the pages.
Flags are national symbols and are out of place here.
It is the norm in the software world to use the ISO 2-character code to signify a language. These are becoming recognised amongst a wider audience. It may be a good idea to try to sniff out users' locations using a script to find their domains. However, this will not always be reliable, as that language may not be viewers' primary language or language of choice. A useful addition to your site would be a list of translation tools available for your visitors to use.