Portuguese, there's a few hundred million speakers of Portuguese in South America.
I suppose I should have included French and made it four ... there's Quebec, but also Martinique, French Guiana, and so on. Maybe 10-15 million all in all?
Vs. ~450m for Spanish, ~400m for English and ~300m for Portuguese.
What about all the African countries south of the equator? Afrikaans is the obvious one, but there must be hundreds of tribal languages. Also don't forget Indonesia and Papua New Guinea. The Amazon surely has tribal languages too.
Well it depends, in my city in Colombia they pushed english a lot. Was also mandatory in my university in case your school was not bilingual. May be an oddity but you are certainly expected to learn it at some point to not fall behind in this globalized world.
Also USA companies hire people cheaply across all industries and have common time zones, so it can be actually worth.
Yeah, in mine too. But if you are not going to leave the continent or study it is not so necessary. I mean the reason I know English is just to look for knowledge.
Also as just @Badass_panda says, 3 languages in the whole hemisphere.