>But, as the original article pointed out, learning a second language helps develop your mind. It can also give you better perspective on another culture.

I never did Latin at school (my wife did, but I think I know more Latin vocab now than her!) but this can be a good argument for Latin or Greek - except instead of learning about a modern culture you're learning about a relatively ancient one; but crucially (at least in Europe) one that is still having a big impact (particularly Roman/Latin).