Does Steven know about Latin American 70s Prog bands?

Given he has a LOT of knowledge in the matter of music history and prog rock in particular, do you think he knows about prog rock bands from South America (Argentina, Chile, Mexico, etc.)?

I'm referring to bands like Pescado Rabioso (1971-73), Invisible (1973-77), La Máquina de Hacer Pájaros (1976-77), Serú Giran (1978-93) Vox Dei (1967-81), and many more, these are just examples from Argentina.

I know he doesn't speak spanish, so it wouldn't surprise me if he didn't know about them, but these bands are really important in the context of 70's latin american rock music. I wonder if he has heard something about them or even knows about their existence.