What can be used to remove fingernail polish from a tile floor?

I would use nail polish remover that is 100% acetone. I have used nail polish remover on linoleum tile and laminate counter tops to remove wall paint and it worked great. I just tried nail polish remover on the tile in my bathroom and it was fine. You won't have to worry about damage. If you are worried about damage try it on a little spot that isn't too visible first.