Duolingo Custom Lessons Guide (Build a Personalized Learning)
Millions of Americans use Duolingo daily yet struggle to achieve real fluency. More than 12 million active U.S. users, according to 2024 App Annie data, report frustration with maintaining streaks without meaningful progress. The challenge is especially difficult for busy learners, as 68% quit within a month based on Duolingo’s 2023 efficacy study. The main…