Which AI-powered language learning product launch in 2012 introduced the first spaced repetition algorithm based on linguistic research that adapted to individual learning patterns?

In the competitive world of language learning apps and platforms, one product launch fundamentally transformed how millions approach language acquisition. This revolutionary product combined adaptive algorithms with linguistic research to create personalized learning paths that were 5x more effective than traditional methods. Test your knowledge about this industry-changing moment that redefined language education technology.

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Duolingo's Adaptive Learning Engine
Rosetta Stone's Dynamic Immersion System
Babbel's Neural Speech Recognition Platform
Memrise's Mnemonic Intelligence Framework