As "TikTok refugees" flood to Chinese site RedNote, language learning app Duolingo has reported an over 200% spike in people learning Mandarin.

Millions are joining RedNote ahead of the TikTok ban. But the app’s default language is Mandarin. “Oh so NOW you’re learning Mandarin,” Duolingo tweeted on Monday.

"First of all, the Chinese are so nice, they're so sweet and so welcoming. They've over here teaching us Mandarin."

Duolingo shares have jumped this week, as the number of Americans learning Mandarin on the app has soared 216%. That's as China's RedNote is now the most downloaded free app on Apple's App Store ahead of the TikTok ban.

Duolingo has seen a surge in U.S. Mandarin learners as TikTok users explore Chinese social app RedNote amid a looming ban.

The language-learning app Duolingo has seen a surprising trend emerge, the closer we get to the TikTok ban -- there's been a 216% spike in US users learning Mandarin compared to this time last year.

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Despite the massive popularity of RedNote in the United States and the different corners of the globe, a majority of its users are still mainly speaking Chinese, and this language barrier has Duolingo racking up its numbers.

When refugees from the app showed up on an alternative called RedNote, understanding was fostered.

As many Americans flock to RedNote ahead of a possible TikTok ban, Duolingo and Drops have seen an increase in US users learning Chinese.

Yes, the language-learning app has been the big winner amid TikTok’s impending demise and it’s mostly due to spite. According to the app, Duolingo has seen a 216 percent growth in users learning Mandarin Chinese over the last year, which is tied to the growing popularity of RedNote.