[kayodelycaon]

This is entirely unsurprising to me. As taught to me, written English (in the US) has a much stricter structure and vocabulary. African-American English was used as the primary example of incorrect and unprofessional writing.

[selimthegrim]

I think that it’s a little more complicated than that as the comment from Brad Daniels at this link would show - https://www.takeourword.com/TOW145/page4.html

NB: I am not African-American, nor did I grew up on an African-American community, and I performed very well on all sorts of verbal tests. Yet, even I made the all intensive purposes mistake until well into adulthood. Probably a Midwestern thing.

[selimthegrim]

*grow up in