Just wanted to update you all on this now, due to the new OGPlanet Launcher. All you need to do it run AppLocale and choose the "ogplauncher.exe" file. The default location for the file is "C:\Program Files\OGPlanet\USLauncher".
After you have AppLocale installed the steps are:
1.) Start>All Programs>Microsoft AppLocale
2.) Launch an application, click browse, (choose the ogplauncher.exe)
3.) Choose Korean as the Language (한국어)
4.) Check the box to create a shortcut.
5.) The launcher will run, and a shortcut will be created here "Start>All Programs>Microsoft AppLocale" that you can keep there or move to the desktop.
Hope this helps anyone who wants to see Korean in-game or get bigger fonts!