One of my favorite literary theorists, Mikhail Bakhtin, wrote that the defining characteristic of the novel is its unprecedented level of "heteroglossia" - the way it brings together so many different registers of language. He doesn't mean national languages, but rather the sublanguages we all navigate between every day: high language, low language, everything. I think there's something really powerful about the idea of the novel as a space that can bring all these languages together - not just aggregate them, like the Internet is so good at doing, but bring them into a dialogue.
