I know a lot less about it than you might expect. I'm able to recall various tidbits about people's life and culture in who-knows-what historical era, but the "big picture" is very low-res. I don't want to keep having surprises like, "oh, these peoples existed", "hey, Afrikaans sounds Germanic, what's up with that", "I've been listening to a song about this guy for months, but I don't know wtf he did" etc.