The Loca team IS working on it.
there is a LOT to localise, its not just 1 or 2 small changes here or there, to my knowledge they are going through EVERYTHING.
The fact there are localisation fixes added with each patch shows they are working on it, for all 4 languages should I add.
As Zurion said, I believe the Loca team to be fairly new, with the previous translations being made by the gPotato / Webzen team, so of course there will be some bedding in period.
The vast majority of complaints I receive are just "loca sucks.. fix it" or are so general it could be anywhere in the loca files.
http://support.my.com/games/kbPage/18/
There is a Localisation section on the support page, for the more urgent issues please use that.
While I push what I can I rarely have the precise information to give them. Using that ticket tool will be directly forwarded to the Loca team (if it does not go to them directly..) instead of having to go through 2 or 3 hands before it gets there.