Sorry, I confused monkeys and apes. In german, we have no nice single-term for monkeys, just Affen for Primates and Menschenaffen for Hominidae, and I didn't thought about that before.

But it makes not much difference. A friend of my wife once gifted her a capuchin monkey, so I could observe the astonishing behavioural similarities to humans (human children) first hand. Since then, I see more and more of them, especially in group behaviour.

And, btw, I don't give a damn how other people use the terms.