But the problem with standard English is that it does not exist, has never existed, and is becoming ever more unreal as more and more ESL users force English to grow faster than any language has ever grown before. "Standard English" has never been spoken outside of the classroom, with the exception of talking heads and radio announcers who were trained to use it for sometimes several minutes without a break., and got big paychecks for being able to pull that off. We are now close to the point where more ESL users are using English to get around their lack of a common native tongue than there are native English speakers who are talking to each other. When Chinese businessmen are negotiating deals with Russians, Argentinians, Vietnamese or anyone else who doesn't speak the common Chinese dialect, they do so in English. When a Finn, an Italian, and a Sumatran collaborate on a software project, they use English.
To repeat: the only place where "standard English" has ever existed is in the imagination of grammar nazis. In the real world, so long as you can be understood, your English is considered on a par with everyone else's, no matter how mangled it may seem to a grammar nazi.