No ebonics and other bad grammar being passed off as "new slang" or dialect?
WEll, Latin did have it's slang -- Vulgate. And that language developed into Italian, Spanish, French etc. (and English derives a lot from French). High Latin is thought to have been a lot harder -- so, instead of pronouncing CAesar as in modern Italin -- Che zaare, it would be more like German -- Kaizer
Caesar fidem scit.