InterSub

What InterSub is

InterSub is an interactive bilingual subtitling tool for language learning. It shows subtitles in two languages, translates words instantly and saves personal vocabulary while you watch YouTube, Netflix, Prime Video, Coursera and similar platforms.

It links watching with vocabulary building.

What you can do with it

• Watch with bilingual subtitles
• Look up new words without leaving the video
• Save words into a personal list
• Review vocabulary on mobile

Who it is for

• Learners of English, Spanish and other languages
• People learning from films, series and courses
• Online class participants

What to watch out for

• Subtitles alone do not produce language mastery; review, listening and active output still matter
• Free query limits suit light use; frequent lookup usually needs a paid plan
• It requires access to the streaming platforms, which are separate subscriptions
• Browser extension access to what you watch is worth a privacy check