The language one speaks has nothing to do with literature class*, as the point is to teach reading comprehension, critical thinking, writing, and whatnot. The exposure of great works before college helps build a firm foundation on which to read and dissect more complex works.

* Obviously the works need to be readable in a language one knows. But it's not like the essence of literature classes change whether one speaks English or German or whatever. That's not the point.

It is easier to pass a literature class when you can already read the language the literature is in.