Intersub
InterSub is a browser extension designed for language learning and skill acquisition. It offers interactive dual subtitles and instant word translations on popular streaming and educational platforms like YouTube, Netflix, Prime Video, Udemy, Coursera, LinkedIn Learning, and TED. InterSub helps users learn new words easily while watching videos, automatically saving viewed words to a personal vocabulary.
Browser extension for language learning with dual subtitles and instant translations.
- Learning English, Spanish, and other languages while watching shows on YouTube and Netflix.
- Install the InterSub browser extension. Watch videos on supported platforms. Use dual subtitles for native and target languages. Hover over words for instant translations. Review saved words in your personal vocabulary.

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