It's probably more informative than "Hey! Hey!", but it's not clear that it rises to the level of language, as opposed to communication. To be precise: not all

It's probably more informative than "Hey! Hey!", but it's not clear that it rises to the level of language, as opposed to communication. To be precise: not all communication is language, language involves grammar, which hasn't (yet) been conclusively demonstrated in any other species. Source: was a neuroscientist who TAed for a guy who tried to teach a chimp language in the 70's.