My logic: Disney translated all of it. Because they wanted us to understand the movie. Also, Wall-e was left behind by the humans, he isn't from the future.<< But he IS in the future. The future from now to there.
You can take this the Disney way, or the nerdy way! Obviously Ariel is Amy Pond and Prince Eric is Rory and they had a baby named melody! It all makes sense now! <<-----I wasn't the only one who thought this!