A Greek king and a Persian king got into an argument over man's "natural" language. The Greek king insisted that it was Greek, of course, and the Persian king insisted that it was Persian. So they proposed an experiment -- the kind that only kings could get away with. They took a newborn baby boy from its mother and carried him off to be raised by a hermit high in the hills, far away from any other people. The hermit -- who was a deaf-mute -- provided the baby with goat's milk and raised him to the age of twelve. At that time, the two kings stopped by to see how their experiment had turned out. When they knocked at the door of the hermit's cabin, the boy answered the door. The two kings silently glanced at each other, and then nervously waited for the boy to speak. Finally, the boy opend his mouth and gave voice to: Baaaaaaaah!
(This is a fun joke to tell, if you can do a convincing goat bleat. )