We need to make sure we set up redirects for all old URLs so we don't break any existing links.
Done, good point.
- How do we keep the translated versions up-to-date?
I was thinking that we could simply call for translations on the forum after important changes in the english version. Perhaps we can also create a CONTRIBUTORS file so that existing translators can be contacted easier at need. However if one language is not up-to-date, I think its far less an issue than not having a translation at all. Changing Bitcoin version can be done without the need for a translator.
BTW, if you can drop some original graphics and fonts (FOR MERCHANTS, Download button, etc) on the FTP (with layers or without texts). I can dig the stuff that would make the translations of pictures easier, put that on git and update the README.