Is Language a Prerequisite for Artificial Intelligence?

I'm skeptical about the utility of language in the long run as a driving force for artificial intelligence. I think we should really be in robotics and other areas where we want rational intelligence decision making, he says. We'll get that power from understanding the physical and visual concepts in the world, rather than necessarily parsing words in English or something. He adds: "If you really want to do some of the people are not good at, then you just hit a wall"