Learn a Language From the Shows You Binge, With Claude Explaining Every Word
Read Frog is a free, open-source browser extension that puts two-language subtitles on Netflix and YouTube and turns the words you meet into flashcards. How to set it up with Claude and turn tonight's episode into a lesson
Read Frog is a free, open-source language-learning extension for your browser, past 10,000 GitHub stars. It shows subtitles on Netflix, YouTube and X in two languages at once, in sync with the video. Tap a word you don't know, and the AI you connect (Claude works) explains it at your level. Save it, and it comes back as a flashcard right before you'd forget it.
Here's what it does, how to connect Claude, and the limits you should know first.
What it does while you watch
- Bilingual subtitles: the translated line sits under the original, in sync, on Netflix, YouTube and X.
- Word lookup: select any word in the subtitles to see what it means and save it.
- Explain: an explanation tailored to your language level, from the AI model you pick.
- Speak: hear the word or line read aloud (300+ free voices, 70+ languages).
- Review: saved words become flashcards; rate Again, Hard, Good or Easy and it schedules the next review.
Free, for your email
Get the full setup steps + the copy-paste setup prompt
The rest of this guide (5 more sections, 1 copy-paste prompt) opens right here. The setup prompt, one paste into Claude that sets it all up, comes by email only. Use your real address.
Unlocks: Step 1: install it · Step 2: connect Claude · Step 3: turn an episode into a lesson · The catch · Sources
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