A browser extension turning Netflix and YouTube into language learning tools.
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Product memo
Language learners use video content to build vocabulary and comprehension. It integrates directly into platforms like Netflix and YouTube, adding dual subtitles and instant word translation on hover. This turns passive viewing into active learning, leveraging existing content consumption habits for efficient language acquisition without interrupting the user experience.
For who
Language learners watching Netflix and YouTube
Solves what
Learning languages through video subtitles and vocabulary building
- Dual subtitles
- Hover to translate
- Smart flashcard practice
In their own words
Learn Languages
SubLingo translates subtitles in real-time, lets you hover any word for instant definitions, and builds your vocabulary — all without leaving your video.
Commercial cues
Model
subscription
Free tier
Yes
Trial
Available
Pricing Strategy
- • A generous free tier encourages adoption and habit formation for new learners.
- • Unlimited features in the paid tier act as the primary upgrades driver.
- • A lifetime deal offers a one-time payment option for long-term users.
Operator context
Team
Indie / lean
Founded
Feb 2026
HQ
Vietnam
Platform
Browser extension
Audience
Consumers
Payments
Lemon Squeezy
Tech stack
Builder Strategy
- Strategy Type
- Niche Specialist
- Stage
- Pre Revenue
- Effort
- Solo Buildable
About SubLingo Expand
SubLingo offers language learners a way to improve their skills directly within their favorite video platforms. It integrates as a Chrome extension, providing dual subtitles and the ability to hover over words for instant translations.
This approach allows users to save new vocabulary and practice with flashcards, turning casual viewing into an active learning session. The product targets individuals who want to learn languages by immersing themselves in native content, making the process more engaging and less disruptive than traditional methods.
Its freemium model encourages adoption by providing essential features upfront, with an upgrade path for unlimited use.