There's literally no one in the actual Latin American countries that call themselves Latinos outside the USA (and perhaps some other rich countries).
I would be called a Latino in the USA, being a Brazilian of brown skin. That amuses me as I have literally never thought of myself or my fellow Brazilians as Latinos... we're simply Brazilian (we may be region-specific, like carioca - from Rio, or Paulista, from Sao Paulo... but still Brazilian, obviously) and I am pretty sure Mexicans, Guatemalans, Peruvians, Colombians and others are the same... just like white Americans do the same: are you ever a white person when presenting yourself to another American, or e.g. Texan, Californian or whatever??
In the US there's two forces at work, the racist side calling all Spanish speakers Mexican (or various slurs) and the various communities attempting to get larger power by uniting on their commonality. The polite racist (government) side chose Hispanic and the grass roots represented by La Raza and others promulgated Latin American/Latino. Meanwhile I've come across younger non-activist second-generation people referring to themselves as Spanish.
It pays a lot to actually participate in the community to know what to do. I find that people don't like being labelled in any community, but that they may use terms of art to describe their membership in different groups.
I would be called a Latino in the USA, being a Brazilian of brown skin. That amuses me as I have literally never thought of myself or my fellow Brazilians as Latinos... we're simply Brazilian (we may be region-specific, like carioca - from Rio, or Paulista, from Sao Paulo... but still Brazilian, obviously) and I am pretty sure Mexicans, Guatemalans, Peruvians, Colombians and others are the same... just like white Americans do the same: are you ever a white person when presenting yourself to another American, or e.g. Texan, Californian or whatever??