:-) :-) Not being a smartass and I'm sure I couldn't body language a "could you point me towards the nearest post office" to a total stranger, but my oldest son talked in sentences late and invented an elaborate system for communicating with me involving two word phrases, made up words, miming and grunting and gesturing. I finally stuck him in preschool to force him to use sentences, which I knew he could do but was refusing to do for some reason. Years later, when I was so ill and frequently in the midst of swallowing pills and thus unable to speak right at that moment, he was the only family member whom I could gesture and grunt at and usually get what I needed.

Language had to start somewhere. Presumably, it began with voice tone conveying important information, which is not terribly different from what most animals seem to do for communication.