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The game itself is almost assuredly not localized to Korean since there'd be too many characters (ie. "letters of the alphabet", except it's not at all like that for Korean) to handle for most computers of the day, not to mention the display resolution is probably not high enough to legibly display those characters anyway.  (More to the point, I'm not aware that the game was ever localized to any other languages anyway, even Western European ones that don't have technical challenges.)

The technical obstacles for doing this in Korean are much less than you might suspect. Although conventional Korean character encoding would probably have lead to problems, Korean is ultimately an alphabetic system (albeit one that combines the letters into a large character, eg. ㅎ ㅏ ㄴ [h + a + n] > 한 [han], the latter being a single character from a technical point of view, but three letters from a human point of view), so if one were to store it in a similar fashion to English letters (rather than storing the combined characters), and have some kind of code that handles rendering them in the more-conventional form, it could at least theoretically be done.

That being said, based on the lack of translation to even European languages, I do agree that it's highly unlikely in practice that they did such a thing. It's just not as much of a technical challenge as you suggest. (Chinese or Japanese on the other hand would indeed have the problems you mention.)