#demonym

Ibex -> Ibexan, Ibexite

I speak Ibexan: O

I speak Ibexite: X

I am an Ibexite: O

I am an Ibexan: O

Ibexan people: O

Ibexan engex: O

Ibexan style garments: O

Ibexite style garments: X

Ibexite people: X

Ibexite engex: X

Ibexites: O

Tarn -> Tarnese, Tarnish, Tarnian

I speak Tarnese: O

I speak Tarnish: X

I speak Tarnian: X

I am a Tarnish: X

I am a Tarnese: O

I am a Tarnian: O

Tarnish people: O

Tarnese people: O

Tarnian people: X

Tarnish engex: X

Tarnese engex: X

Tarnian engex: O

Tarnish style garments: X

Tarnese style garments: O

Tarnian style garments: X

Tarnians: O

Kaon -> Kaonese, Kaonite Kaonian

I speak Kaonese: O

I speak Kaonite: X

I speak Kaonian: O

I am a Kaonese: O

I am a Kaonite: O

I am a Kaonian: O

Kaonese people: O

Kaonite people: X

Kaonian people: O

Kaonese engex: X

Kaonite engex: X

Kaonian engex: O

Kaonese style garments: X

Kaonite style garments: X

Kaonian style garments: O

Kaonites: O

Kaonians: O

Helex -> Helexan, Helexi, Helexite

I speak Helexan: O

I speak Helexi: O

I speak Helexite: X

I am a Helexan: O

I am a Helexi: O

I am a Helexite: O

Helexan people: X

Helexi people: O

Helexite people: O

Helexan engex: O

Helexi engex: O

Helexite engex: X

Helexan sttle garment: O

Helexi style garment: O

Helexite style garment: X

Helexans: O

Helexis: X

Helexites: O

And lastly, here are the ones that I don't even know what to do with:

Rust Sea -> Seafarer

They literally navigate through the Sea of Rust so why the heck not? Unless they are Aquatronians, they wouldn't even know what 'Seafarer' originally means.

Crystal City -> ?????

I sincerely have no idea

Pit Stop -> ????????

Pit Stop is the biggest land-based city on Velocitron. If Navitas is the capital city of all mobile cities, Pit Stop is the capital city of all stationary cities.

And I have no idea how to call people from this place.

Delphi -> ???????