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.
It was so sad I was watching monsters inc. With a 4 year old and kitty was leaving boo and she just started crying! I asked her what was wrong and she whispered through crying " I don't want kitty to go" so I sat there and cried with her.