There are alot of enormous gulfs that stand in between even the most intelligent creatures and humans. Language is certainly one of them. The unity of language provides a basis for how all languages are derived from one. This corrolary is evident by the similarity of roots words and grammatical structure. The similarity of the Indo-European family of languages, as well as Semitic, Hamitic and Sino-Asiatic all seem to have some root language at the base. Certain philologists seem to think that it was likely Sumerian and that other ancient languages including Hebrew, Akkadian, Egpytian and Sanskrit were offshoots of the original Sumerian language.
I think you might be overestimating the gulf between men and other intellegnet being. Dolphins have sounds sequences that are names.