Duolingo shares climb 7% as users swarm to app to learn Mandarin
1. Duolingo sees 216% surge in Mandarin learners year-over-year due to RedNote. 2. Spanish learners increased by 40% in the same period, showing strong demand. 3. RedNote becomes the top free app amid fears of TikTok's potential U.S. ban. 4. Duolingo's proactive marketing on RedNote may bolster its user growth. 5. Shares rose nearly 7% on news of increasing Mandarin user sign-ups.