“Studies have shown that animals that respond to commands do so based on vocal tones rather than the spoken words. Thus, all attempts to solve the evolutionary origin of language have failed.
Every child that learns how to speak learns from someone who already knows how to speak. There do not seem to be any exceptions to this rule. Feral children who grow up without contact with spoken language did not learn to speak until they came into contact with speaking individuals. Once they had heard speech, they were able to learn how to speak (Tomb 1925).”
Plus archaeologists do not see evidence of simple communication but rather fully formed languages.
Read more details here; https://newcreation.blog/how-did-humans-learn-to-speak/
Picture from: https://pixabay.com/photos/monkey-sculpture-carving-speaking-236861/ accessed 1/6/23.