Tolkien wrote a book, he did not actually create Middle Earth and the languages spoken by actual people resident there. I appreciate that I may be naive in this, and will be told the error of my ways by people who use the word “canon” a lot, but I don’t really care.
This stuff exists chiefly in the reader’s head. In my head, Heathcliff from Wuthering Heights generally isn’t black and doesn’t speak with a Mancunian accent, because the idea that he ought to was not really impressed upon my 17 year old mind. The one in your head may well differ. I care only very slightly what Emily Bronte thought about the matter.
🙂