Chrome extension for YouTube immersion

Learn a language from the videos and music you love.

Generate subtitles, explore words and translations, and bring your own lyrics to study your favorite songs.

Public YouTube videos + Shorts · No captions required

How To Use

A guide for every step.

Install the extension, generate your first subtitles, and learn how to correct lyrics and make the most of your study tools.

Open the guide

Bring your own lyrics

Your favorite song.
Your lyrics. Your next lesson.

Already have the words? Paste the full lyrics for a generated song track. We fit them to its existing timing and rebuild translations, pronunciation, and word data.

Learn how to replace lyrics

A small correction. A different meaning.

Generated line

Bajo la una, vuelvo a cantar.

With your lyrics

Bajo la luna, vuelvo a cantar.

“Under the moon, I sing again.”

Example text · Existing timing, refreshed learning layers.

Just one word to fix? Edit it directly in the transcript. Full lyrics correction replaces the whole track; use complete lyrics for the song.

Less waiting. More watching.

Start with the first subtitles.
Keep learning as more arrive.

Subtitles appear as they become ready, before the whole track is finished. Choose the AI model for your next generation to suit the language you are studying.

For demanding language study

TranscriberThe default choice

Our most capable model for language processing. Takes a little longer, but delivers better quality for complex phrases, subtle meanings, and detailed study.

Nuance · Context · Detail

For a faster start

Transcriber-SparkBuilt for speed

Blazing fast for everyday watching. Less capable than Transcriber with complex language, but a great choice when speed matters most.

Speed · Flow · Everyday study

Generation time varies with the video, language, model, and queue. Model choice applies to generation; full lyrics correction uses Transcriber with either selection.

Make the words stick

Watch a little. Understand a lot.

Your study tools live beside the video, ready when you need them.

A word worth stopping for

Click a subtitle word for its meaning, reading, and usage in context. Optional hover pause gives you a moment to take it in.

Understand it. Then read it.

Follow the original subtitles with a translation and optional romanization. Choose your subtitle language and the language you want to learn through.

Give your ears a second chance

Blur words or translations, reveal them when you need a hint, and replay the current line. Keyboard shortcuts keep you in the flow.

Find that line again

Search the transcript, jump to a cue, and switch between saved generations. Reopen generated tracks from your history while they are retained.

From setup to subtitles

Make tonight’s video your next lesson.

Get the extension

Add the extension to desktop Chrome through the Chrome Web Store or install a downloaded package.

How to install

Choose your plan

Create an account and choose a subscription. Sign in to the extension with the same account.

Compare plans

Open a video and generate

Pick your languages and model, then select Generate. Subtitles appear inside YouTube as they become ready.

Language coverage

A world of videos.
Find your language.

From Spanish and French to Japanese, Arabic, and Hindi. Auto detect is available when you are unsure of the subtitle language.

Supported subtitle and translation languages

Choose your subtitle and translation languages independently. Results vary with the language, audio, and selected model.

  • Afrikaans
  • Amharic
  • Arabic
  • Armenian
  • Assamese
  • Asturian
  • Azerbaijani
  • Belarusian
  • Bengali
  • Bosnian
  • Bulgarian
  • Burmese
  • Cantonese
  • Catalan
  • Croatian
  • Czech
  • Danish
  • Dutch
  • English
  • Estonian
  • Filipino
  • Finnish
  • French
  • Galician
  • Ganda
  • Georgian
  • German
  • Greek
  • Gujarati
  • Hausa
  • Hebrew
  • Hindi
  • Hungarian
  • Icelandic
  • Igbo
  • Indonesian
  • Irish
  • Italian
  • Japanese
  • Javanese
  • Kannada
  • Kazakh
  • Khmer
  • Korean
  • Kurdish
  • Kyrgyz
  • Lao
  • Latvian
  • Lithuanian
  • Luxembourgish
  • Macedonian
  • Malay
  • Malayalam
  • Maltese
  • Mandarin
  • Maori
  • Marathi
  • Mongolian
  • Nepali
  • Northern Sotho
  • Norwegian
  • Occitan
  • Odia
  • Pashto
  • Persian
  • Polish
  • Portuguese
  • Punjabi
  • Romanian
  • Russian
  • Serbian
  • Shona
  • Sindhi
  • Slovak
  • Slovenian
  • Somali
  • Spanish
  • Swahili
  • Swedish
  • Tajik
  • Tamil
  • Telugu
  • Thai
  • Turkish
  • Ukrainian
  • Urdu
  • Uzbek
  • Vietnamese
  • Welsh
  • Wolof
  • Xhosa
  • Yoruba
  • Zulu

Simple monthly plans

Pick your pace.
Keep your curiosity.

Choose how many video minutes you generate each month and how many videos you work on at once. Cancel any time from your account.

Included with every plan: Transcriber and Transcriber-Spark model choice, translations, optional romanization, interactive word cards, and lyrics correction.

For desktop Chrome. Follow the installation guide, then sign in to the extension with your account.

Base

$9/month

  • 90 video minutes per month
  • Standard queue
  • Simultaneous videos: 1
  • All learning tools included
Choose Base

Pro

$39/month

  • 600 video minutes per month
  • Fast queue
  • Simultaneous videos: 3
  • All learning tools included
Choose Pro

Minutes count the video you generate, rounded up to whole minutes. A 10-minute video uses 10 minutes; replaying a retained track uses none. Cancelling generation does not refund its reserved minutes. Failed generations release unused reserved minutes. Checkout is hosted by Stripe. Cancel your subscription from your account; contact support for refunds.

Before you get started

A few things worth knowing.

01What can I watch?

Only public YouTube watch pages and Shorts are supported, including music videos. Use the extension in desktop Chrome. Existing captions are not required. Private videos, live captioning, and other platforms are not supported.

02Can I use my own lyrics?

Yes. After generating a song track, open Lyric correction and paste the complete lyrics. The app fits them to the track’s existing timing and rebuilds translations, pronunciation, and word data using Transcriber. This replaces the full track; it does not fetch lyrics or create new timing from the audio. Check the result before studying.

03Can I fix just one word?

Yes. Choose Edit on a transcript line, select a word, and enter the correction. The app refreshes that line’s learning data while keeping its timing. Word fixes and full lyrics correction do not use additional generated-video minutes.

04Which model should I choose?

Choose Transcriber for better quality with complex language and detailed study. Choose Transcriber-Spark for blazing-fast generation when speed is your priority. Select the model before generating; an existing generation keeps its model. Full lyrics correction always uses Transcriber.

05How long does generation take?

The wait depends on video length, language, model, selected learning layers, and queue demand. Subtitles appear as they become ready, so you can start before the entire track is finished. Reopening a retained completed track does not require a new generation.

06What happens to my audio and subtitles?

Temporary raw audio is used for processing and deleted after success or failure. Generated tracks are retained for 30 days for reuse and support. Interactive word cards explain words in context; saved vocabulary and a spaced-repetition review system are not currently included.

07What if something goes wrong?

Subtitles can contain mistakes, especially with unclear audio. You can correct words or replace a song’s lyrics. Contact support to report a bug or get help with billing, access, or generation failures.

Made for your kind of immersion

One more video.
One more thing understood.

Your favorite creators and songs already have your attention. Give them a place in your language learning.