It seems like because it does not have the language pack installed, then the ? is in place of characters that it does not understand.
Is this an on line game, or one that is played offline?
If it is on line, then it is possible that you may be able to use another Internet browser that already has a Korean translator installed. If it has the translator, then it would also be able to see and display the characters. A good IE alternate that can translate on-the-fly, is Opera. You would have to d/l a language pack for Korean, as it is not included by default. After you have the characters displayed, you should be able to use this
to translate. You can go from Korean to English.
If it is offline, then are there any associated files that you can view in notepad? Most of these support files would be ending in .txt, but you should be able to right-click nearly any file, and select 'open with...' choose program, and select notepad or wordpad. Just make sure that you do NOT
check the box that says 'Always use the selected program to open this kind of file'. Sometimes support files are not always apparent, and you may find the answer there. You may even find some Korean characters in these files. If that does happen, try to copy and paste them into the translator mentioned above.
We are all curious like a cat. We wonder, we ask, we learn.
Please post back when a suggestion works, so that others may learn.