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JoJoJi

ExtensionEducation
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Overview

Learn to speak a language with YouTube: dual subtitles, shadowing line by line, and spaced repetition of the words you keep.

Learn to speak a language with the YouTube videos you already love. JoJoJi turns any YouTube video with subtitles into a speaking lesson: • Dual subtitles — the original line and its translation, with pronunciation for Japanese, Korean, Chinese, Thai and more. • Shadowing — press Shadow (or H): each line plays again, slower, and you say it out loud with the native speaker. • Click any word — its meaning in this sentence and how to say it. Nothing else in your way. • Keep it — one click turns the word into a flashcard, with the original sentence. Review it a few minutes a day at jojoji.app, right before you would forget it. No setup, no decks to build, no settings to learn. JoJoJi requires a subscription. Works on YouTube in Google Chrome on desktop. YouTube is a trademark of Google LLC. JoJoJi is not affiliated with Google.

Details

  • Version
    0.1.2
  • Updated
    November 11, 2026
  • Features
    Offers in-app purchases
  • Size
    423KiB
  • Languages
    13 languages
  • Developer
    Timothée Jean LEGER ESPERANDIEU
    27 Rue de Montaud Saint-Étienne 42000 FR
    Website
    Email
    theanemonelab@gmail.com
    Phone
    +33 6 25 13 62 51
  • Trader
    This developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.

Privacy

Manage extensions and learn how they're being used in your organization

JoJoJi has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

JoJoJi handles the following:

Personally identifiable information
Authentication information
Website content

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

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