It's a bit unrelated, but in case you don't want to change your locale setting (via Control Panel thingies that might mess up other program) and want to display those korean words properly in the client, use Locale Emulator.

Do following things:
1. Download and install Locale Emulator, see installation instruction.
2. Run the game with solista
3. Open Task manager and go to Details tab, right click one of any column (e.g Name, PID, Status, etc) and click "Select columns" and tick "Command line" box
4. Look up for "OTwo_solista.exe" process, once you found, click it and press CTRL+C
5. Now open notepad, and paste, your pasted data should look like this:


Name PID Status User name CPU Memory (private working set) Command line Description
OTwo_solista.exe 17196 Not responding SirusDoma 00 48,492 K OTwo_solista.exe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|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010 OTwo_solista.exe


Now, copy ONLY the Command line argument, in my case, the command line argument that start with "00C" and ends with "15010". For above example, the command line is:


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|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010|test|??|127.0.0.1|15010


Note: those arguments may vary depending on your character settings (it may contains username and password), if you copy argument above, it won't work on your end

6. Now open your solista folder, open your O2Solista emulator, but don't run it, Right click your OTwo_solista.exe and click Locale Emulator -> Modify Application Profile
7. Paste the command line argument in the box where it says "Enter argument here (if any)", change location settings to Korea and tick "Run as Administrator" and "Fake system UI language"
well, you can also tick "Fake registry", but the game does not use specific language registry, so it won't matter)
8. The game will run once you press save.
9. The next time you run the game, you don't launch the game via solista but you still need solista emulator to run.
so Open your solista, don't run your game from there but instead right click OTwo_solista.exe Locale Emulator -> Run with Application Profile or simply "Create shortcut" before pressing "Save" button.

A bit troublesome since the locale emulator cannot redirect the emulation from solista emulator to the client, but it works :p