Non-human primates may not have as complex of a language system as humans do, but there is evidence that they have complex communication systems that could be considered simple language systems; but equally fascinating is that some non-human primates can be taught new and simple language systems outside of their normal systems. The idea is that language develops when there is a benefit to the animal. Innate language amongst the groupings and other groupings in the same area is in order to communicate for survival; mating calls, warning calls, and so on. The learned language systems are a response in order to receive rewards or to get the attention of humans in order to benefit the non-human primate in one way or another; sounds to grab attention
