What's being argued here is like saying "french" and "francais" are completely unrelated words because they sound different, despite being somewhat similar in s

What's being argued here is like saying "french" and "francais" are completely unrelated words because they sound different, despite being somewhat similar in sound and having a clear shared origin and meaning. You can go pretty much anywhere on earth and say "huh? uh? ummm?" in response to something that you don't understand and people will get that you don't understand. Say another word, like "Great", and they might not know that you're affirming whatever they said. And "yes" doesn't exist in all languages. Many languages require the speaker to repeat back part of the statement or the verb to affirm something.