At least in the grassroots language learner community, there seems to be a growing sense that the most efficient way to achieve real fluency in a second languag

At least in the grassroots language learner community, there seems to be a growing sense that the most efficient way to achieve real fluency in a second language is: regular long-term effort to read or listen to text or media in the language that is just a little above your level of understanding. Notably different from how duolingo works. https://en.wikipedia.org/wiki/Input_hypothesis https://en.wikipedia.org/wiki/Input_hypothesis