Also keep in mind that in official US usage that term basically means "someone from a Spanish cultural background OR a Latin American country". Although some agencies specifically exclude countries from Latin America without a Spanish or Portuguese culture.

So a white guy whose grandparents immigrated from Spain counts (the grandparents spoke Spanish), and a Quechua from Bolivia who recently immigrated and only speaks Runasimi counts (Bolivia has a Spanish culture), and a black guy from Guyana might count. The OMB says no (Guyana was colonised by the British), but the Census says yes (it's in South America, so close enough).

The system makes very little sense.