Which language learning app's marketing campaign first popularized the phrase 'five minutes a day' as a revolutionary approach to language acquisition?

In the world of language and linguistics, marketing campaigns have played a significant role in promoting language learning platforms, translation services, and educational tools. Some campaigns have become legendary in the industry for their innovative approaches or significant impact. Test your knowledge about a groundbreaking marketing campaign that changed how language learning was perceived by the general public.

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Duolingo, with its 2013 campaign emphasizing bite-sized daily learning
Rosetta Stone, with its 2010 immersion-based marketing approach
Babbel, with its 2015 'Speak a new language with confidence' campaign
Memrise, with its 2016 'Learn like a native' marketing strategy