Since animals use language of some form or another depending on species.... from the flashing and color shifting of cuttlefish to the alarm calls of birds or the rumblings and yowls of cats, I don’t see the point in comparing language use vs non use of language here, as if there was ever a time when any primate could not make squeals and grunts meaningful to them.
Why of courseros!
This article does come form Berkley after all. There is a lot of theory that it seems to me to be impossible to prove but that does not stop them form accepting it as fact. Why do they never come up with things to back up their wild theories.