Duolingo's gamification helps but lacks adaptive difficulty and grammar depth for serious learners

Claim

Duolingo's repetitive reinforcement is less useful than adaptive difficulty; it needs grammar-focused lessons, gender glossaries for languages like German, and clear A1/A2 benchmark tests.

Mechanism

The user's experience shows that skipping levels without studying and over-repeating phrases like 'Is Chicago loud?' undermines learning. Adding difficulty settings, grammar modules, and sortable glossaries would improve retention and real-world speaking ability.