Conservatives shouldn’t be caviling at this. Millions of people comprise dozens of groups that speak different languages today, all of which use English. It isn’t even a black-specific issue. There are, so to speak, Redneck, and Tough Guy, and other kinds of dialects in the “white community.” Courts which don’t recognize this will devolve into confusion.
Is it up to the judge to clarify whether “just a minute” is a clock minute or something else? (Note to judge: the expression exists in the white community also).
I would think it would be up to the attorneys arguing the case to pin down whether “just a minute” was a clock minute or something else. Otherwise instructions from to the jury would take forever.