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.
Hasn't Thomas Sowell pointed out that black Americans adopted the culture of the poorest whites in the South after emancipation, including elements of their way of speaking. So called black vernacular is essentially the speech pattern of the poor English, Scots and Irish who lived in the South in the Antebellum and Reconstruction era.