I have added Dimitri Herla as a member of the team. Dimitri has been doing some work on the message translations, including code changes to bring it all up to date.
Dimitri, you asked how you commit changes to SVN. As you have already checked out the code, presumably using Eclipse, then all you need to do is commit in the normal way. You will be asked for a user and password which will be your sf user (dherla) and password. We don't have any special rules or procedures. In addition to jmoney-devel, you might want to subscribe to the jmoney-cvs list so that you get automatic notification whenever something is checked in. (The list name is confusing, the code is now in Subversion).