By whom.....that’s who. :-)
Besides, there's no such thing as proper queens English in this country. It's called American English. Heck, there ain't no such thing as English in this country!
There's ebonics, (and that even has regional variants) There's Cajun english, New Yawk english, (a strange form of english which doesn't use the letter "R" except in extreme emergencies) Massachusetts/Bostonian english, New Orleans english, Tennessian, Ozarkian, Texan, Kansian Ohioian, and queer english, where every word possible must have a lisp involved and every sentence has an upward inflection.