leapCAT

Book translation for indie authors and publishers

You don't speak the language.
You shouldn't have to judge your book's translation.

leapCAT picks the terms and character names once, so they stay the same through the whole book. An AI from another company checks every chapter against your original, and what it finds gets fixed. You get a report in your own language: what was decided, what was fixed, and what couldn't be checked.

Get a free quoteHow it works
  • Free quote
  • Full refund before translation starts
  • We don't train AI on your manuscript

How much would it cost to translate my book?

KRW 1,190,000

70,000 words × English factor 1.00 × KRW 17

Get a free quote

This is an estimate at today's price. Upload your book for the exact price. The quote is free.

Upload TXT, PDF, DOCX or EPUBGet it back as DOCX or EPUB42 languages

Other AI translators give you errors to decide on.
leapCAT decides and fixes them.

Other AI book translators

Error cards

It is a truth universally acknowledged, that a single man in possession of a good fortune, must be in want of a wife.

98.6/100Critical 0 · Major 2 · Minor 11

MajorAccuracy › Mistranslation
necesita una esposa → debe de necesitar una esposa
The original’s irony implies assumption, not fact. Use a modal of supposition.
MinorStyle › Register
gran fortuna → buena fortuna
“good fortune” is idiomatic; “gran” overstates.
You decide on each one, in a language you don't speak.

leapCAT

Your reportEnglish

Es una verdad universalmente reconocida que un hombre soltero, poseedor de una buena fortuna, debe de necesitar una esposa.

DecidedKept “Netherfield Park” in English everywhere, like the book's other estate names.Based on: how the book names this estate throughout.
FixedChapter 1, paragraph 1: “necesita una esposa” made it sound like the man himself wants a wife. Changed so the irony is about what the neighbours assume.Why: the narrator is making fun of what the neighbours believe, not stating a fact about him.
Couldn't checkWe couldn't confirm a Spanish word for “a chaise and four” (a type of carriage).Translated close to the original and flagged here.
Already decided and fixed. You read what was done, in your own language.

Left: error cards as other AI book translators show them on their own sites. Right: how a leapCAT report is laid out. Both are examples, not real results.

How leapCAT compares

  • leapCATKRW 1,190,000
    Who decides terms, names and tone
    leapCAT decides for the whole book and asks you only what the manuscript can't tell
    Who reviews the translation
    An AI from another company checks every chapter against the original; a third AI settles disagreements
    How you know if it's good
    A report in your language: what was decided, what was fixed, what couldn't be checked
    Native-speaker proofread before publishing
    Not included. Anything that couldn't be checked is named in your report.
    70,000-word book, English to Spanish
    KRW 1,190,000
    Refunds
    In full before it starts; the untranslated part after; in full when we are at fault
  • Translate a Book (Author mode)about €93–101
    Who decides terms, names and tone
    AI drafts a guide; you edit and confirm it
    Who reviews the translation
    Other AI models in the same service (as the company describes it)
    How you know if it's good
    A score out of 100 and error cards; you decide on each card
    Native-speaker proofread before publishing
    The company recommends a light native proofread
    70,000-word book, English to Spanish
    about €93–101
    Refunds
    When a technical problem keeps you from getting the file
  • Kindle TranslateFree (invited KDP eBooks only)
    Who decides terms, names and tone
    Not published
    Who reviews the translation
    Amazon's automatic quality evaluation
    How you know if it's good
    Passed / cannot be published
    Native-speaker proofread before publishing
    The translated text can't be edited
    70,000-word book, English to Spanish
    Free (invited KDP eBooks only)
    Refunds
    Not applicable (free)
  • Luman$120
    Who decides terms, names and tone
    You provide the glossary and character notes
    Who reviews the translation
    None by default; human review is quoted separately
    How you know if it's good
    The translated file (no report published)
    Native-speaker proofread before publishing
    States it doesn't replace proofreading or pre-publication review
    70,000-word book, English to Spanish
    $120
    Refunds
    Only if cancelled before processing starts
  • Reedsy translatorabout $4,200 (published average rate)
    Who decides terms, names and tone
    The translator proposes; you comment
    Who reviews the translation
    Often a colleague translator edits and proofreads
    How you know if it's good
    The translation (if you can't read it, they suggest asking a friend)
    Native-speaker proofread before publishing
    The translator provides a ready-to-publish translation
    70,000-word book, English to Spanish
    about $4,200 (published average rate)
    Refunds
    No rule on the translation page
  • Translated (Premium)Quote (about €8,000 at the published example rate)
    Who decides terms, names and tone
    The translator (glossary on request)
    Who reviews the translation
    A second native translator reviews all of it
    How you know if it's good
    Not published
    Native-speaker proofread before publishing
    Second-translator review included in this tier
    70,000-word book, English to Spanish
    Quote (about €8,000 at the published example rate)
    Refunds
    Refund if late; free re-review if unhappy

leapCAT's price covers the term choices, the full review by another company's AI, the final check and any fixes it needs, and your report in your language.

Everything about other services comes from their own public pages, checked October 19, 2026. Prices are for a 70,000-word English novel translated into Spanish. leapCAT's price applies once payment opens.

Sources: Translate a Book (Author mode) [1] https://translateabook.com/blog/ai-book-translation-vs-human [2] https://translateabook.com/legal/ai-policy [3] https://translateabook.com/ [4] https://translateabook.com/tools/price-calculator [5] https://translateabook.com/legal/terms-and-conditions · Kindle Translate [1] https://kdp.amazon.com/en_US/help/topic/G5T45L2KKNGNQ6CT [2] https://kdp.amazon.com/en_US/help/topic/G3BC6VBB6GMZKSBJ [3] https://kdp.amazon.com/en_US/help/topic/GRSNH76FDTJHRX49 · Luman [1] https://www.lumantechnology.com/terms-and-conditions [2] https://www.lumantechnology.com/products/translation [3] https://www.lumantechnology.com/pricing · Reedsy translator [1] https://reedsy.com/translation · Translated (Premium) [1] https://translated.com/translation-rates [2] https://translated.com/frequently-asked-questions

How it works

What you do

  1. 1Upload your manuscript
  2. 2Answer a few questions only you can answer, or let leapCAT choose
  3. 3Download your translated book and the report

What leapCAT does

  1. 01

    Prepare

    Picks the terms, character names and tone for the whole book, and notes where each choice comes from.

  2. 02

    Translate

    Translates the whole book with those choices, so names and terms stay the same.

  3. 03

    Review

    An AI from another company checks every chapter against your original. If the two AIs disagree, a third AI decides.

  4. 04

    Final check

    The translation has to pass a set standard.

If it doesn't pass, it's fixed and checked again.

If it still doesn't pass, your report tells you.

What you get back

Your reportExample

Chapter 1 · Spanish translation

Es una verdad universalmente reconocida que un hombre soltero, poseedor de una buena fortuna, debe de necesitarFixed una esposa. … Netherfield ParkDecided por fin se ha alquilado: el joven llegó el lunes en una calesa tirada por cuatro caballosCouldn't check para ver la finca.

DecidedTerms and names used across the whole book, and why
FixedWhat changed and why, in your language
Couldn't checkWhat couldn't be checked, and why

And your translated book as DOCX or EPUB.

Price

  • A 70,000-word English manuscript: KRW 1,190,000
  • A 70,000-word Korean manuscript: KRW 1,654,100

Words × language factor × KRW 17 = price

The same text takes more words in some languages than in others, so we convert every book's length to English words.

Minimum KRW 10,000 per book

Payments aren't open yet. Quotes are free.

Back to the calculator Pricing details

Refunds

  • Before translation starts: full refund
  • After it starts: refund for the part not yet translated
  • If a problem on our side stops part of your book from being translated: full refund for that part
Refund policy

What happens to your manuscript

  • We don't train AI on your manuscript or translation.
  • Each step sends only the text it needs to the AI companies listed in our privacy policy.
  • If you delete your account, we delete your manuscript and translation.

Questions

Is this AI translation?

Yes. AI does the translation, the review and the final check. That's why every chapter can be checked and the price is still a fraction of what a human translator charges.

Which languages can I translate from and into?

42 languages. Your book can be written in any of them and translated into any other.

See all 42 languages
  • Amharic
  • Arabic
  • Bangla
  • Chinese
  • Czech
  • Danish
  • Dutch
  • English
  • Filipino
  • French
  • German
  • Greek
  • Gujarati
  • Hebrew
  • Hindi
  • Indonesian
  • Italian
  • Japanese
  • Kannada
  • Korean
  • Lithuanian
  • Malay
  • Malayalam
  • Marathi
  • Norwegian
  • Persian
  • Polish
  • Portuguese
  • Punjabi
  • Romanian
  • Russian
  • Serbian
  • Somali
  • Spanish
  • Swahili
  • Swedish
  • Tamil
  • Telugu
  • Thai
  • Turkish
  • Ukrainian
  • Vietnamese
What files can I upload, and what do I get back?

TXT, PDF (scanned pages too), DOCX or EPUB. You get the translation back as DOCX or EPUB, with its chapters and paragraphs. The layout, images and footnotes of your original file are not carried over.

Which AI do you use?

Models from Google, OpenAI and Anthropic, listed in our privacy policy. Each step sends only the text it needs.

Can I publish it on Amazon?

Yes. Download your translation as DOCX or EPUB and publish it wherever you sell your books.

What if my report says something couldn't be checked?

The report tells you what it is and why. If you like, send a read-and-comment link to someone who reads that language. Their comments are shown to you in your own language.

What if it doesn't pass the final check?

Your report tells you where it fell short. You can still read and download the translation.

Do I keep the rights to my book?

Yes. The rights to your manuscript stay with you.

See what your book would cost to translate

Get a free quote

Free quote · full refund before translation starts