An anthropologist writes about communication and language in The Language Puzzle, https://www.kirkusreviews.com/book-reviews/steven-mithen/the-language-puzzle/

An anthropologist writes about communication and language in The Language Puzzle, https://www.kirkusreviews.com/book-reviews/steven-mithen/the-language-puzzle/ https://www.kirkusreviews.com/book-reviews/steven-mithen/the... , TLDR, a little speculative but no primate exhibits evidence beyond a very primitive form of communication - only the extreme outliers are used in demonstrations, which are not much upon closer examination, there’s probably an evolutionary step needed for any other primate than man to use language as far as we can tell. There are key differences in brain and vocalization physiology between humans and other primates .