Option for Different Languages for Champions?

I recently heard the Korean voice over for Ashe and I have to say I really loved it and prefer it to the English one, and I was wondering, is there any way to change the voiceovers of champions without messing in the files? I've never seen an option for that in the menus. Also, if there isn't a way, how difficult would it be to implement that change say in champ select, similar to picking skins? Sorry if this doesn't necessarily fit the board, but I figured since it would have to do with sound files this would be the best place to post.