Brazilians and Argentines: are they considered Latinos?

[Shiny]

Latinos come from countries where Spanish is the main language. Brazil, Belize, Guyana & French Guinea aren't technically part of Latin America. Latinos can be of any race, whether it's black, white or indigenous.

Surely Spanish people are Hispanic though, right? Not Latino. Or or are they both?

Hispanic & Latino are the same thing. Hispanic is just archaic & not as acceptable. Kind of like Blacks not wanting to be labeled "colored".

I think Spaniards are considered Latino, but obviously not Latin American.

No it isn't the same as blacks not being labeled as colored at all. Colored has a racist connotation and reverts back to segregation era. Hispanic refers to people of Spanish origins who are Spanish speaking. Latino refers to people from Latin America. A more clearer example of this is Jamaican people being called African-American. They'd prefer to be called Jamaican or black because African-American is completely wrong. Same for Haitian people I've come across.

EDIT: I just asked my Brazilian friend what he would prefer being called and he said Latino.