Which language learning company first popularized the tagline "The fastest way to learn a language guaranteed™"?

Test your knowledge of famous taglines from language learning products and services! Throughout history, language education companies have created memorable slogans that captured their unique approaches to teaching. These taglines often become cultural touchpoints, reflecting both marketing brilliance and the educational philosophies of their time. Can you match these iconic linguistic catchphrases to the correct brands?

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Rosetta Stone
Pimsleur
Duolingo
Babbel