I'm no expert myself, but
Latin is an Italic language originally spoken in Latium and Ancient Rome. With the Roman conquest, Latin was spread to countries around the Mediterranean, including a large part of Europe. Romance languages such as Aragonese, Corsican, Catalan, French, Italian, Portuguese, Romanian, Sardinian, and Spanish are all descended from Latin, hence Latino. I know that the cultures of many of these regions have evolved on their own, but they all still share a common heritage. That's how it was always explained to me anyway, but then again I'm only a quarter Latino and more German White Anglo-Saxon.
But, then again, I think you're emphasizing more cultural heritage than language.