Duolingo Stock Plunges Over 10% on T-Mobile AI Translation Service Announcement

Duolingo (NASDAQ: DUOL) shares experienced a significant decline, plummeting over 10% on February 11th. This sharp market reaction followed T-Mobile's (NASDAQ: TMUS) announcement of a new network-integrated, real-time artificial intelligence (AI) translation service. Investors are now reassessing Duolingo's core language-learning business, perceiving T-Mobile's offering as a direct and substantial competitive threat. The introduction of such a service by a major telecommunications provider raises concerns about potential future revenue erosion and increased market pressure for Duolingo. This latest downturn contributes to a challenging year for the company, with its stock having fallen approximately 40% since the start of the year.