Interesting point. I don't know where HB is from, but I was acutely aware when in Jamaica that those who grew up there speak two tongues fluently and lapse from one to the other depending on who is around. One is formal English with colonial Brit overtones and the other is a sort of gullah pidgin or creole vernacular which uses many English words and many slang words blended in an unintelligible slurry. Beautiful to hear, but for me, impossible to understand! So it may be second nature for someone in that cultural mix to do contextual shifts from one pronunciation scheme to the other in midstream, fluidly, I speculate.

A