There is actually an ancient Greek translation of the the philosopher's stone! What's cool is they even edited the original UK cover where it says Hogwarts Express to say it in ancient Greek.
And a Latin translation, too. “Harrius Potter et Philosophi Lapis”, translated by Peter Needham. I found Needham's inventiveness in expressing modern concepts in the ancient language quite enjoyable. I only ever read this version, never the English one :)
There's a Latin translation as well, which is pretty amazing.