Duolingo stock (NASDAQ:DUOL) has decreased by 22.8% in under a month, falling from $369.19 on 8/18/2025 to $285.11 at present. The sell-off comes amid worries of decelerating active user growth and fierce competition from AI-driven alternatives such as Google’s new AI language tools. There are other new competitive threats, too. For instance, Apple’s latest iteration of its ubiquitous AirPods feature real-time translation, which poses a challenge to Duolingo’s core language-learning offerings. So, is this a ...