Reading the wiki for Wall-E, I learned something that makes complete sense now that I think of it. "Andrew Stanton [the movie's director] pitched the story to Ben Burtt who signed on to do the sound design. There is little traditional dialogue in the film; Stanton joked, 'I’m basically making R2-D2: The Movie'" Something that stood out to me with Wall-E was his manner of 'speaking', if you will: from what I've seen in the previews, it's not dialogue in any way, shape or form and was closer to a favorite Star Wars astromech droid. Learning that Ben Burtt is doing the sound design is AWESOME!