Grammar of Sharlayan

[Bixby]

Fortunately, English is flexible enough to grammar anything and everything.
To use examples, it would be similar enough to be said to be the same as saying that Y'shtola is a Boston cop, a Georgetown logger, or a London architect.

Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo.

You're right about using the names of places as adjectives (or adverbs; "Boston strong") without modification. But Balipu is right about the nouns. We don't call someone "a Boston." We tack -an, -ian, or -ite on the end of place names to turn them into nouns that mean "a person from <place>." I can't think of any examples where the name of the place is used, unmodified/unaccompanied, as the noun to refer to its natives.

And I'd say -ite would probably be the one in this case, as we tend to not double-up on -an or -ian. (Edit: Or perhaps -er.)

[Balipu]

Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo.

You're right about using the names of places as adjectives (or adverbs; "Boston strong") without modification. But Balipu is right about the nouns. We don't call someone "a Boston." We tack -an, -ian, or -ite on the end of place names to turn them into nouns that mean "a person from <place>." I can't think of any examples where the name of the place is used, unmodified/unaccompanied, as the noun to refer to its natives.

And I'd say -ite would probably be the one in this case, as we tend to not double-up on -an or -ian. (Edit: Or perhaps -er.)

Sharlayanite? Sounds good. Anyway Sharlayan is in Dravania and we will get to Dravania in Heavensward so it would be nice to resolve the issue untill then.

[gornotck]

The thing is that we CAN say that Y'shtola, a Sharlayan of the city-state of Sharlayan, is a Sharlayan indeed though the contextual clue that by saying that Y'shtola is a Sharlayan so she is a native of Sharlayan thereby.
Does this come up usually? Not really. Nicknames, mostly, where people are referred to as 'Boston' or 'Dallas' or any number of cities, states, counties, countries, parishes, or other regional identifying nomenclatures.
It is unusual, perhaps, but in no way erroneous.