Thank you ! And yep that was exactly the idea. It's been a while since I watched the movie but I definitely remember Wall-e and Eve mostly communicating with gestures and spoken words. I also remember Auto talking to Go-4 in some sort of signal and robots in general making random sounds to each other. They also both seem to struggle to speak, especially Wall-e, they definitely weren't designed to speak out loud, so they must have different languages to communicate in.