Which AI-powered feature, first introduced by Duolingo in 2020, revolutionized language learning apps by providing real-time pronunciation feedback using speech recognition technology?

The language learning app market has transformed how people acquire new languages worldwide. Behind the sleek interfaces we use today were groundbreaking product launches that changed the industry forever. This poll tests your knowledge about a pivotal moment in language learning technology that revolutionized how users practice pronunciation and receive feedback. Do you know which technological innovation truly changed the game?

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Duolingo Sound Check
Duolingo Voice Match
Duolingo Pronunciation Pro
Duolingo Echo System