South Americans speak a Latin language - maybe that's why they are called latinos. I'm sure some of them also have Italian/Latini yDNA
If we look at Romania which are Latin speakers, they don't have much J2b L283 so I don't think it was spread much by Latin speakers. Some J2B L283 was absorbed by proto Albanians particularly in the north (or was part of proto Albanians)
Precisely what i am talking about. Various different people who speak Latin dialect were called Latins despite having different origins.
Latin was lingua franca and has made tremendous influence in modern world, like many words stem from them and Greek especially in science and literature.