Far-fetched is usually used to convey something is unlikely, a story that is improbable. E.g The idea that the dog could speak English was a rather far-fetched notion. Far-flung is used to convey something geographic. E.g you'll find English speakers in far-flung corners of the globe.

Yes, you can :)

English language speakers come from Anglo-french and they were extended to the next people who follow language as pluralism was used that. The difference is that some people are interested in developing grammatically language while other people just are Using it without any grammar rules. for that reason, many people are making just a description of the language..they follow writing and speaking as much as pluralism do that. Thank you.