@Bella Dea,
Bella: Linguistically, what English is considered proper English? Is there such a thing?
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"Proper" is a loaded term that leads, has led to all sorts of silly notions about language, Bella. There is no proper English. There is English that is appropriate to the situation and in this you could say it's proper but again that's a highly misleading term that is best avoided.
Bella: I assumed that there was one accepted English with many different dialects. Perhaps I am incorrect?
Yes, you are incorrect but don't feel bad as you have plenty of company.
McTag plays this game of saying not much, the better to keep himself out of trouble, but it mostly amounts to saying little to nothing constructive as regards the workings of language.