what do you call a resident of a planet
A resident of Naples is called a Neapolitan.
A resident of Oregon is known as an "Oregonian."
A Bangkok resident is commonly referred to as a Bangkokian.
Latvian
A Caldicottian.
You call them spanians because they dont have a specific name, because Madrid is in spain so you are spanish or you are a spanian.
You can call them a fellow resident or a neighbor.
Yemeni
A lucky Mexican
call the police
A resident alien?