I know some guys hear are historians and u/AlfredicEnglishRules is an anthropologist. I was listening to a podcast and someone brought up some groups in America use slang predominately because their biology makes English difficult for them. I'm wondering how biology affects language? Is it just an IQ thing, or are there subtle differences in vocal chords? Or is it bullshit?
I can understand cultural differences shaping languages. And I've heard evolutionary differences, like early men having to increase their vocabularies to include dogs in their hunting.
Biology might be able to have some interaction with parts of the brain commonly involved in language processing. Which invariably could have secondary effects on how individuals, and maybe even a culture communicates and develops language.
Beyond that though you might be reaching a bit. And I don't think you're necessarily accounting for how distinctly different language rules can be, which can affect how strict or how flexible grammar, syntax, etc etc.