Does the development of the human brain cause the evolution of language to occur? Yes, languages do influence each other; however, that is not the only answer for language change. There is much more in involved? Could changes in the brain also cause changes in a language? If I were to operate on you and remove that portion of the brain that causes languages, would that demonstrate the possibility of theistic evolutionary development? You would not then be able to speak. Let this be a topic, Brad. We linguists are scientists too, you know. Let us open up the hornets' nest of discussion. Shall we? Make this a topic. Language is a part of origins too.