Which language learning product launch in 2012 revolutionized the industry by introducing a gamified, adaptive learning algorithm that personalized language acquisition for each user?

In the world of language and linguistics, product innovation often involves developing new tools, methodologies, and technologies that transform how we learn, communicate, and process language. This poll tests your knowledge about a significant product launch that revolutionized language learning and accessibility in the digital age.

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Duolingo
Rosetta Stone Version 5
Babbel's Speech Recognition Platform
Memrise's Mnemonic System