Which language learning platform's 2019 marketing campaign featured celebrities taking on language challenges and became the first in the industry to reach over 100 million social media impressions in a single week?

Language learning apps and platforms have transformed how we approach linguistics education. Behind these innovations are sophisticated marketing campaigns that have shaped consumer behavior and brand perception. This trivia question tests your knowledge of a groundbreaking marketing campaign that revolutionized the language learning industry and set new standards for user engagement.

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Duolingo's "Real Life Language" campaign
Babbel's "Understanding America" campaign
Rosetta Stone's "Unlimited Languages" campaign
Memrise's "Learn Like a Local" campaign