It doesn't matter what you think "tween" means. "Albeit" means "all be it" or "although be it," both of which are absolute nonsense, but even I know that it's a standard English word. The danger with hanging on to things that you haven't noticed have evolved is that you're going to criticise people who have not done anything wrong. They've merely gone with the flow, which Canute demonstrated that we all have to do. Take a tip from him.