hmm. i don't have any major feedback; just some minor grammar things.
You could get rid of most of the unnecessary commas in the sentence "Dionne Brand’s book of poetry ... assumptions about “proper” language." by changing it to "Dionne Brand’s book of poetry, No Language is Neutral, challenges that norm by combining Trinidad English Creole with standard Canadian English to create a text that confronts Canadian assumptions about “proper” language."
Also, in the sentence, "Linguist Braj Kachru proposes ... the traditional centres of English.", i don't know if you really need that last part about the inner circle countries. you could just say "Linguist Braj Kachru proposes that native English speakers from certain “inner circle” countries, which include Canada, establish the standards of English for the rest of the world." or, if you really want the "traditional centres" part, you could say "...countries, which include traditional centres of English such as Canada, establish..."
Lastly, are you supposed to format book titles in a certain format? underlines or quotation marks or something?
other than that, it's pretty well written, and the paper sounds really interesting. good luck!!