InterSub
Language LearningFreemium
Enhance video watching with InterSub: AI-powered interactive subtitles for seamless language learning.
Last updated Apr 18, 2026
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What is InterSub?
InterSub's Top Features
Key capabilities that make InterSub stand out.
Dual Subtitles
Instant Translations
Personal Wordbook
Multi-Platform Support
Collocation Detection
'Show Subtitles on Pause' Mode
Remote Control
Hotkeys
Ad-Supported Unlimited Lookups
Mobile Integration
Use Cases
Who benefits most from this tool.
Individual language learners
Use InterSub to learn vocabulary in context while watching videos.
Students
Utilize InterSub as an educational tool on platforms like Coursera to understand course material better.
Film enthusiasts
Watch foreign films with dual subtitles to grasp cultural nuances and patterns.
Educators
Use as a supplementary tool for interactive language learning in classrooms.
Travelers
Prepare for trips by learning languages through context-driven video watching.
Business professionals
Enhance language skills relevant to international business through targeted video content.
Language tutors
Recommend InterSub to students for enhanced self-study and vocabulary building.
Culture aficionados
Deepen cultural understanding by consistent exposure to foreign media.
E-learning developers
Integrate InterSub into language courses to offer interactive learning experiences.
Parents
Encourage children to learn new languages in a fun and engaging way through videos.
Tags
AIlanguage learningvideo watchingsubtitlestranslationvocabularybrowser extensions
InterSub's Pricing
Free plan available
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Frequently Asked Questions
What are the core features of InterSub?
InterSub offers dual subtitles in your native and target languages, instant translations, a personal wordbook, and supports multiple platforms including YouTube and Netflix, along with features like 'Show Subtitles on Pause.'
Which video platforms does InterSub support?
InterSub supports YouTube, Netflix, Prime Video, TED, Coursera, Udemy, and more, with plans to expand further.
How does the instant translation feature work?
Hovering over a word in subtitles provides an instant AI-generated definition, aiding quick understanding during video watching.
What is the personal wordbook, and how does it help with learning?
It saves words you've looked up for personalized vocabulary practice, enhancing retention through spaced repetition.
Can I use InterSub on mobile devices?
Yes, InterSub offers mobile app integration for on-the-go vocabulary review and supports syncing with apps and Telegram bots.
How does the 'Show Subtitles on Pause' mode work, and why is it useful?
It displays subtitles only when the video is paused, minimizing distractions and promoting focused learning.
What is collocation detection, and why is it important for language learners?
InterSub's AI identifies collocations like idioms, enhancing comprehension of nuanced language.
How can I use hotkeys with InterSub?
Hotkeys allow quick function control like resizing subtitles, offering flexibility during use.
What are the pricing options for InterSub?
There are free ad-supported lookups and paid plans offering advanced features and an ad-free experience.
How do I install InterSub?
InterSub is a browser extension for Chrome, Edge, and Firefox, installable from their website or browser stores.