In order to make it work, you’d need to write in such a way that every phrase precisely straddled the line between characteristically “black” and “white” American speech, and that’s a high-wire act in an eagle-eyed country, ever alert to racial codes, adept at categorization, in which most people feel they can spot a black or white speaker with their eyes closed, precisely because of the tone and rhythm “peculiar to” their language…