Which innovative marketing strategy did Duolingo implement in 2019 that resulted in a 20% increase in daily active users?

Marketing in the language and linguistics industry has evolved dramatically over the years. Companies that create language learning apps, translation services, and linguistic analysis tools have developed unique strategies to reach their audiences. This poll tests your knowledge about how language-focused companies have adapted their marketing approaches to capitalize on changing consumer trends and technological advancements.

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The introduction of the threatening green owl meme campaign
Partnerships with major universities for credit-earning courses
Celebrity linguist endorsements featuring Stephen Fry
AI-generated personalized learning advertisements