Turn any YouTube video into a language lesson
Watch. Harvest. Learn
Tap a video and you are in the studio with captions, instant translation, and a review habit from the first minute.
Not sure your level? Take the free 5-minute test.Supports 10 languages: Mandarin, Japanese, French, Brazilian Portuguese, Spanish, Hindi, Swahili, Korean, German, and Italian.
Not sure your level?
Take a free 5-minute placement test. 10 languages, no sign-up, instant result with a study plan.
Common questions
What is Ka’aKatu?
Ka’aKatu turns any YouTube video into a personal language garden. Paste a link, watch with a synced transcript, hover any word for an instant translation, and harvest phrases into spaced-repetition review. You can also generate level-matched stories. Ten languages, a free placement test, and a daily watering habit that grows your vocabulary over time.
How much does Ka’aKatu cost?
The core is free: watch videos, harvest phrases, and take the placement test. Pro is $8 a month or $60 a year, with multiple gardens, story generation, and exports.
Which languages does Ka’aKatu support?
Ten: Mandarin, Japanese, Korean, Spanish, French, Portuguese, German, Italian, Hindi, and Swahili.
Do I need an account to try it?
No. Paste any public YouTube link to try the studio right away. Sign in only when you want to save and plant phrases.