Translation depend on other users.
If a language currently isn't included in PT2k5, then someone needs to translate it first.
Translations arnt done by Macecraft it self.
If you can translate it to Korean, that would be greate :).
The simplest way to do this is by copying the english.lng file and rename it to korean.lng, after that you can start the translation.
When you are finished you can mail the translation to files@macecraft.com and when no errors, it will be included asap.