Duolingo Faces Class Action Lawsuit Over Alleged Growth Misrepresentations

The complaint alleges that Duolingo knowingly compromised its product quality to boost short-term financial gains. According to the suit, the company’s internal A/B testing consistently revealed that increased ad volume and aggressive subscription upsells were driving users away, directly contradicting the growth metrics presented to the market. Furthermore, the filing claims that the integration of rapidly generated AI content degraded the user experience, threatening the long-term sustainability of the platform's financial performance.

Investors seeking to participate in the litigation have until December 7, 2026, to apply for lead plaintiff status. While the case proceeds, the law firm emphasizes that individual shareholders are not required to act as lead plaintiffs to remain eligible for a potential recovery. The firm represents clients on a contingency basis, meaning legal fees are recovered only if the lawsuit results in a successful financial settlement.