Which revolutionary marketing strategy first used neurolinguistic research to personalize language learning advertisements based on a customer's native language patterns?

In the competitive world of language learning products and services, marketing strategies have evolved dramatically. Companies have employed innovative linguistic approaches to stand out in a crowded marketplace. This trivia question explores a significant marketing breakthrough that changed how language products are advertised and perceived by consumers. Test your knowledge about the intersection of linguistics and marketing innovation!

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Duolingo's Adaptive Response Marketing (2018), which analyzed speech patterns to customize ads showing different learning paths
Rosetta Stone's Neural Network Campaign (2015), which focused on visual learning styles based on cultural backgrounds
Babbel's Linguistic Fingerprint Initiative (2019), which categorized learners by pronunciation challenges in their target language
Memrise's Cognitive Framework Advertising (2017), which targeted ads based on memorization techniques from different language families