Inside Duolingo’s viral TikTok stunt at Charli XCX’s concert—guerrilla marketing lessons for brands

On the heels of “Brat Summer,” Duolingo recruited more than 20 employees to don masks of mascot Duo at the opening night of Charli XCX and Troye Sivan’s “Sweat Tour.”

On the heels of “Brat Summer,” Duolingo recruited more than 20 employees to don masks of mascot Duo at the opening night of Charli XCX and Troye Sivan’s “Sweat Tour.”