If a cat is a meow-meow, a dog is a woof-woof, and a cow is a moo-moo ... then a human is a blah-blah.

Yes! "The Greeks used the term barbarian for all non-Greek-speaking people, including the Egyptians, Persians, Medes and Phoenicians, emphasizing their otherness. According to Greek writers, this was because the language they spoke sounded to Greeks like gibberish represented by the sounds "bar..bar..;" the alleged root of the word bárbaros, which is an echomimetic or onomatopoeic word."

https://en.wikipedia.org/wiki/Barbarian