We're aware of it, but are not going to deal with it until after .LRN 2.3.1 is released this month.
The person maintaining that server is unavailable at the moment, and this has been increasingly a problem the last few months.
So our solution will be to move the translation server elsewhere, perhaps to the openacs.org server, which several senior members of the community have admin access to.
Do you need to do some translations immediately? If so, you could install locally, translate, export the catalogs and add the modified ones to CVS if you have local server capability.
The translation server exists primarily so non-developers can contribute (I'm not familiar with your name, so don't know exactly what skills you have).