The box and disks look very similar to the usual PC English edition, so I wouldn't be surprised if it's exactly the same as the English edition aside from the Korean on the box and possibly in the game manual booklet (assuming there's one). 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.)
edit: I did notice they did actually bother to also update the "Lemmings" title logo on the disk labels as well, based on the photo. Makes me wonder if there's a (extremely) slim chance that they might actually have updated in-game logo graphics as well? Doubtful to be sure, but I guess there's no way to know without tracking down a copy.