NEW YORK, Oct. 26, 2026 /PRNewswire/ -- Why: Rosen Law Firm, a global investor rights law firm, reminds purchasers of Class A common stock of Duolingo, Inc. (NASDAQ: DUOL) between May 2, 2025 to February 26, 2026, inclusive (the "Class Period"), of the important December 7, 2026 lead...