You would need to replace the font and would need a codePageToUnicode.map file at least. There's a thread about a Russian translation on our forums somewhere that gives more details.
I'm not sure we can do a Korean translation though. We don't have full unicode support. Russian is the most complex language that any of our games have been translated in to.
Depths of Peril, Kivi's Underworld, Din's Curse, Drox Operative, Zombasite, Din's Legacy, & Drox Operative 2