So, which vtuber was responsible for starting the Duolingo trend? It seems like Duolingo streams were not a thing until fairly recently, but one day someone decided to stream themselves learning on Duolingo, and suddenly it feels like a bunch of vtubers started noticing and realizing "Oh shit, this is good stream content" so everyone wants a piece of the action now.
It's actually pretty genius, easygoing compared to playing a game and educational, no limit to how many times they can do it, so they just get some learning done and watch the superchats flow in. But I want to know who started it. Who came up with this idea that somehow nobody else had thought of?