On the Firefox Support start pages, there are blocks of text on the sidebar labeled “Improve the Knowledge Base” and “Thunderbird”.
Those are referred to as “modules”, and until now those blocks have not been localizable. We are in the midst making the interface translator work on those modules. If you’d like to help test it, you can do so on the the staging server.
If you have any issues with it, comment on bug 444439 .
If you’re not familiar with the interface translator and have questions, just reply to this post.