I'd have to agree with @Shaggy. My last EPCOT trip I spent the better part of the day in World Showcase talking with cast members from their represented countries and had a blast (I may have been participating in a drinking around the world event). I think it would add to the overall theme of IS at KI to uses international workers.
CP uses them, and they seem to be nicer, and more polite than the teenage local workers. Last year at Muffleheads at CP Shores we had a bartender from Poland and he was a lot of fun, than at either Happy Frier or Hot Potato cannot remember which one had a young lady from Japan serve us and she was all smiles and eager to help.