AI-Powered Subtitle Translation: A Game-Changer for Language Learners
InterSub Extension now automatically translates subtitles on the fly, ensuring you always have dual subtitles for a seamless streaming experience.

Learning a new language through streaming and videos on YouTube, Netflix, Amazon Prime, and other platforms just got easier! InterSub is introducing a powerful new feature: AI-powered subtitle translation—helping you access bilingual subtitles even when your preferred language isn’t available.
Whether you’re improving your skills through dual subtitles or immersing yourself in foreign-language content, this update makes language learning more accessible.
Why AI Subtitle Translation?
Many language learners rely on bilingual subtitles to enhance comprehension and retention. But what if a video lacks subtitles in your target language? This is a common issue due to streaming platform restrictions, regional limitations, or simply because subtitles haven’t been provided.
Previously, if secondary subtitles weren’t available, InterSub displayed a message saying, “Sorry, these subtitles are unavailable.” We've changed that!
InterSub Extension now automatically translates subtitles on the fly, ensuring you always have dual subtitles for a seamless streaming experience.
How Does AI Subtitle Translation Work?
- Detecting Available Subtitles: If a video lacks subtitles in your preferred language, InterSub fetches them in another available language.
- AI-Powered Translation: We send these subtitles to Microsoft Translator, our top choice for high-quality video translation. Should there be any issues, Google Translate serves as our real-time backup.
- Instant Display & Caching: The translated subtitles appear instantly and are cached, so you don’t need to translate them again the next time you watch.
AI Movie Translations Key Benefits for Language Learners
Better Comprehension: Watching with dual subtitles in your native language and target language helps reinforce vocabulary and grammar structures.
- Increased Accessibility: No more struggling with missing subtitles—now you can get bilingual subtitles even when they aren’t officially available.
- Seamless Experience: Translated subtitles appear instantly, with no noticeable delay.
Who Can Use This Feature?
- Available for all paid users, including our Pay-As-You-Go plan ($2.50).
- Not included in the free plan.
Future Enhancements – Your Opinion Matters!
We’re considering adding higher-quality translations using services like DeepL, AWS Translate, or ChatGPT in future updates and are conducting internal tests.
With AI-powered bilingual subtitles, language learners can now enjoy seamless, uninterrupted learning—no matter where they watch. Try it today and let us know what you think!
Key Features of InterSub
InterSub is designed to provide an immersive, intuitive language learning experience. Check out some of our key features:
- Multi-Platform Compatibility: InterSub works seamlessly on 8 platforms, including Netflix, YouTube, Prime Video, Crunchyroll, Coursera, and Udemy. View the full list here.
- Bilingual Subtitles: Display dual subtitles—your native and target languages—at the same time to enhance comprehension and reinforce vocabulary recognition.
- Popup Dictionary: Easily translate new words with instant hover functionality, helping you understand in real-time without interrupting your streaming.
- Vocabulary Builder: Automatically save words you look up into your InterSub Wordbook, ready to sync with Anki for future practice.
RTL Support: InterSub is fully optimized for right-to-left (RTL) languages like Arabic, Hebrew, and Urdu, ensuring smooth, readable subtitles for learners of these languages.
