Which language learning platform's 2012 advertising campaign revolutionized the industry by shifting from academic marketing to gamified, bite-sized learning with the tagline 'Five minutes a day. Free forever.'?

In the competitive world of language learning apps and platforms, branding plays a crucial role in market success. One particular rebranding effort in this industry created significant buzz and completely transformed a company's market position through innovative advertising campaigns. This poll tests your knowledge of major advertising campaign shifts in the language learning technology sector that shaped how these products are perceived and marketed today.

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Duolingo
Rosetta Stone
Babbel
Memrise