It's the other way around(though double-checking the stuff me and CXu already did would be very helpful indeed)!
http://osu.ppy.sh/forum/t/104342 is the link to the localisation project thread, though. Might be worth a read before you start translating/checking.
http://osu.ppy.sh/forum/t/104342 is the link to the localisation project thread, though. Might be worth a read before you start translating/checking.