Since studies have concluded 39 hours on Duolingo is equivalent to a semester of college courses, I wonder if it would be a good idea to launch a linguathon?
This would be an event where people come together to learn a completely new language for two days, just like a hackathon!
39 hours over 39 days will produce a lot more retention than 39 hours over two days, owing to how memory works and the rôle of sleep in these processes. A hackathon involves applying previously-learnt skills, not learning hundreds of new ones.
I'd suggest that spending an hour or so a day on a new language for a month would be a much better use of this time period.
I think he meant this one: Duolingo Effectiveness Study > The study estimated that a person with no knowledge of Spanish would need between 26 and 49 hours (or 34 hours on average) to cover the material for the first college semester of Spanish. Of course Duolingo cannot be compared with advanced class. But I think it's quite effective comparing with some 101 classes.