Adapt the feeling.
Not just the words.
Paste lyrics in Hindi, Japanese, Korean, Spanish, or Urdu — adapted into English, not translated.
Built by Rohan Dhir · Updated
Six languages, any direction
How it works
Not translation.
A rewrite that still means it.
Captions land as a draft you read and edit first — a starting point, not a finished adaptation.
Imports straight from YouTube
Paste a link and the captions come back as reviewable sections — read them over, fix anything, then adapt. Nothing goes out the door unread.
Keep what you find
Star a result or file it into a collection from the dashboard — it's there next time, tied to your account, not lost in a chat history.
Under the hood
A real Writers' Room, not one prompt.
Every line goes through the same pipeline: a literal translation to anchor against, five differently-angled creative rewrites, then a Judge that rules against the anchor and logs every real departure with a reason — the same "why" note shown above.
Source lyrics
Original language, any of six
Translator
A literal anchor — the floor everything else diffs against
Creative Adapter
Five candidates, one per adaptation philosophy
Judge
Rules against the anchor, logs every real deviation with a reason
Verified output
Checked against the anchor before it ships
Common questions
What does Castia do?
CASTIA helps adapt comic and webtoon dialogue while preserving character voice, emotional intent, and scene context. Each adapted line is shown with a plain-language reason for the creative choice.
Which languages are supported?
The current engine supports English, Hindi, Japanese, Korean, Spanish, and Urdu. Available directions depend on the deployed language configuration.
How is this different from Google Translate or a single AI prompt?
Every line goes through a three-stage "Writers' Room": a Translator produces one literal anchor translation, a Creative Adapter produces five differently-angled rewrites, and a Judge scores each rewrite against that anchor and picks a winner — writing down the specific reason it departs from a literal translation. A single translation call has no anchor to check itself against and no record of why a word choice changed.
Do I need an account?
No — a limited number of adaptations per day work with no account at all. Signing in with Google adds a history of your past adaptations and lets you star or collect results so they're there next time.