Duolingo stock is crashing and T-Mobile may be to blame

Duolingo (NASDAQ: DUOL) tanked more than 10% on February 11th after T-Mobile (NASDAQ: TMUS) made a bombshell announcement that threatens its core business.

T-Mobile unveiled a network-integrated, real-time artificial intelligence (AI) translation service on Wednesday, making DUOL investors reassess the value of a dedicated language-learning app.

Year-to-date, Duolingo stock is now down roughly 40%.

How T-Mobile’s solution threatens Duolingo stock

With T-Mobile’s latest launch of “Live Translation”, users can translate phone calls in “real-time” across 50+ languages.

Unlike Duolingo, which requires years of “streaks” and commitment to achieve fluency, this new solution requires no apps, no downloads, and no effort.

By embedding agentic artificial intelligence directly into the “5G Advanced” signal, T-Mobile has effectively commoditized the end goal of language learning: communication.

In short, T-Mobile’s new offering significantly reduces the incentive to subscribe to Duolingo Max.

For many casual users, the app has shifted from a “must have” to an “optional” hobby overnight – which makes DUOL stock far less attractive to own in 2026.

AI is a double-edged sword for DUOL shares

T-Mobile’s launch is particularly concerning for Duolingo Inc since its fundamentals have already started showing cracks.

The Nasdaq-listed firm has grappled with growth deceleration in recent quarters – and investment firms including Goldman Sachs and Wells Fargo believe it’s unlikely to change anytime soon.

In their recent reports, analysts voiced concerns of “challenging comparisons”, noting pandemic-era hyper-growth is firmly in the rearview mirror.

Most importantly, Wall Street is concerned that DUOL is facing a “double-edged sword” with AI.

While Duolingo uses AI to power its lessons, the same technology allows competitors like Google and OpenAI to create hyper-efficient, free alternatives that bypass the need for a dedicated learning curriculum.

This “AI-parity” risk suggests the firm’s proprietary content may no longer command a premium, raising questions about whether Duolingo shares can stage a strong comeback in 2026.

Where options data suggests Duolingo may be headed

While DUOL shares sure look compelling at a price-to-sales (P/S) multiple of about “6” only, the technical picture suggests a near-term rebound is unlikely.

A relative strength index (14-day) in the deeply oversold territory and key moving averages (MAs) sitting handily above the current stock price, Duolingo appears to be in a strong downtrend.

This dwindling fundamental and technical overview is why firms like “Baillie Gifford” have been cutting exposure to the education technology company.

Finally, options traders warn of a continued plunge in Duolingo Inc as well. According to Barchart, the lower price on contracts expiring mid-May sits at about $70 currently, indicating potential for another 30% decline over the next three months.

In conclusion, DUOL is no longer being priced as a high-flying tech stock, but as a legacy ed-tech play struggling to defend its borders against the encroaching AI giants.

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