The problem is that the adjective “United Statian” is a mouthful; Yankee (my dad’s favorite) unfair; gringo refers (used to?) to Italians in Argentina.
United States doesn't have an adjective. Colombian would be nice, but its also taken and now problematic.
>The problem is that the adjective “United Statian” is a mouthful
Even that can be confusing. United states could also refer to Mexico, which has the actual name "United Mexican States". Someone from Mexico can rightly call themselves from united states.
United States doesn't have an adjective. Colombian would be nice, but its also taken and now problematic.