Which innovative advertising campaign first popularized the concept of 'language acquisition through neural adaptation' that revolutionized how language learning products are marketed?

In the competitive world of language learning platforms and translation services, companies are constantly innovating their product offerings and marketing strategies. The intersection of linguistics and retail has created fascinating trends in how language products are marketed globally. Test your knowledge about a groundbreaking advertising campaign that changed how language learning products are positioned in the market.

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Rosetta Stone's 'Think in the Language' campaign (2014)
Duolingo's 'Adaptive Learning Pathway' campaign (2016)
Babbel's 'Neurological Immersion' series (2015)
Memrise's 'Memory Science Revolution' promotion (2017)