Question 1

What languages does BookTranslator support for translation?

Accepted Answer

BookTranslator supports translation from any language into a wide range of languages including Simplified Chinese, Traditional Chinese, English, Japanese, Korean, French, German, Russian, Spanish, Portuguese, Italian, Dutch, Swedish, Thai, Vietnamese, and more.

Question 2

What formats of books does BookTranslator support for translation?

Accepted Answer

BookTranslator supports the translation of EPUB / PDF / DOCX / TXT / SRT / MOBI etc. and many more formats. We also support subtitles (SRT, VTT, ASS, SSA), Markdown, HTML, and localization files (PO, JSON, CSV, TSV, XLIFF, XML, TOML, INI, Properties, Strings).

Question 3

How accurate is BookTranslator's translation?

Accepted Answer

Our translation capability is based on OpenAI's GPT model. Compared to most translation tools such as Google Translate and DeepL Translate, it can understand the content of the text according to the context to choose the appropriate translation, rather than translating word by word literally, thus providing a more natural and accurate translation effect.

Question 4

How long does it take to translate a book with BookTranslator?

Accepted Answer

The time it takes to translate a book with BookTranslator depends on the length of the book. Generally speaking, the translation speed is fast, and a book of about 150,000 words can be translated in two or three minutes.

Question 5

Is the translation good enough for publishing or professional use?

Accepted Answer

BookTranslator uses advanced AI models that understand context, maintain proper grammar, and preserve the author’s tone. For general content, personal reading, academic research, and business documents, the quality is excellent and ready to use directly. For professional literary publishing, we recommend using the translation as a high-quality first draft and having a native speaker review it for nuanced stylistic choices. Many users find our translations suitable for direct use without further editing.

Question 6

What AI models and translation engines does BookTranslator use?

Accepted Answer

BookTranslator uses state-of-the-art large language models (LLMs) for translation, including models from leading AI providers. Unlike basic machine translation tools like Google Translate or DeepL that translate sentence by sentence, our AI understands context across entire paragraphs and chapters, preserves meaning and tone, and handles specialized terminology naturally. We continuously evaluate and upgrade our translation engines to deliver the best possible quality.

Question 7

How does BookTranslator handle specialized terminology and cultural references?

Accepted Answer

Our AI translation engine recognizes domain-specific terminology in fields like medicine, law, finance, and technology, and selects appropriate equivalents in the target language. For cultural references, the AI aims to maintain the original meaning while adapting to the target culture’s context. The system understands idioms, metaphors, and colloquial expressions, translating their intent rather than translating word-by-word.

Question 8

Does BookTranslator preserve the original layout and formatting?

Accepted Answer

Yes. BookTranslator is designed to preserve the original document’s formatting, layout, styles, images, tables, headers, footers, and other structural elements. For PDF files, the translated text is rendered back into the original layout positions. For EPUB files, chapter structure, table of contents, CSS styling, and fonts are maintained. The output looks like the original document, just in a different language.

Question 9

How do I know when my translation task is complete?

Accepted Answer

Once your translation is ready, you’ll receive an email with a download link. Alternatively, you can visit your translation history at https://www.booktranslator.app/history to download your book.

Question 10

How do I download the translated book file?

Accepted Answer

When the translation task is completed, click the "Download" button in the previously submitted translation task card in the "History" to save the translated file to your mobile system.

Question 11

Why are some paragraphs in my translation results not translated?

Accepted Answer

This is because some EPUB / PDF files have a special format, and in some cases, there may still be missing or omitted content. We will constantly optimize the translation results to provide users with a better translation experience.
You can inform us of your book name and screenshots of the translation problem through customer service email, we will help you check where the problem with the translation results is, and will try to send you a complete translation version. If you are still not satisfied with the translation results, you can apply for a refund via email.

Question 12

Can I get a bilingual output with both original and translated text?

Accepted Answer

Yes! BookTranslator supports bilingual output for PDF translations. You'll receive a document with alternating pages — each source page followed by its translated version — so you can easily compare the original and translation side by side. This is especially useful for language learners, academic review, and quality verification.

Question 13

Can BookTranslator translate scanned PDFs or text inside images?

Accepted Answer

Yes. BookTranslator uses OCR (Optical Character Recognition) technology to extract text from scanned PDFs and images, then translates it while preserving the original layout. For best results with scanned documents, we recommend a scan resolution of at least 300 DPI. We also support image translation (JPEG, PNG) where text within images is detected, translated, and rendered back into the image.

Question 14

What are the file size and page limits?

Accepted Answer

BookTranslator supports files up to 100 MB in size. For PDF files, there is no strict page limit, though very large documents (over 2,000 pages) may take longer to process. EPUB, DOCX, and other ebook formats have no practical page limit. If your file exceeds these limits, you can split it into smaller parts and translate them separately.

Question 15

Can I preview the translation before paying?

Accepted Answer

Yes! BookTranslator offers a free trial that lets you translate a portion of your document at no cost. This way, you can evaluate the translation quality, formatting preservation, and overall experience before committing to a full translation. Simply upload your file and start a free trial translation to see the results.

Question 16

Can I translate multiple files at once?

Accepted Answer

You can upload and translate multiple files from your translation dashboard. Each file is processed as a separate translation task, and you'll receive notifications as each one completes. This makes it easy to translate an entire collection of documents or books in one session.

Question 17

Does BookTranslator support right-to-left languages like Arabic and Hebrew?

Accepted Answer

Yes. BookTranslator fully supports right-to-left (RTL) languages including Arabic, Hebrew, Farsi, and Urdu. The translation engine handles bidirectional text correctly, and the output preserves proper RTL text direction and layout.

Question 18

Do I need to create an account to use BookTranslator?

Accepted Answer

Yes, a free account is required to use BookTranslator. Signing up takes less than a minute using your email or social login. An account lets you access your translation history, download completed translations, and manage your files.

Question 19

Do I need to install any software?

Accepted Answer

No. BookTranslator is a fully web-based service. You can upload, translate, and download your files directly in your browser — no software installation required. We also offer mobile apps for iOS and Android if you prefer to translate on your phone or tablet.

Question 20

Does BookTranslator charge a fee? How to purchase?

Accepted Answer

Due to the large expense of calling the ChatGPT API, we need to charge a fee to provide you with the best translation service. The specific charge for BookTranslator is determined according to the length of the book submitted, the longer the book, the higher the charge. You can check the cost of translating the book by submitting the book in the app and directly purchase the translation service.

Question 21

Does BookTranslator offer a free trial?

Accepted Answer

BookTranslator currently cannot offer a free trial, but we are actively exploring ways to offer translation discounts for new users.

Question 22

How can I get an invoice for my purchase?

Accepted Answer

After completing a payment, Stripe automatically sends a receipt to your registered email address. You can also view and download your invoices from the Billing page in your account settings (Settings → Billing). If you need a customized invoice with specific billing details (e.g., company name, tax ID), please contact us at support@booktranslator.app.

Question 23

What payment methods does BookTranslator accept?

Accepted Answer

BookTranslator uses Stripe to process payments securely. We accept all major credit and debit cards (Visa, Mastercard, American Express, etc.), as well as other payment methods supported by Stripe in your region, such as Apple Pay, Google Pay, and local payment options. You can manage your payment methods in your account settings under Settings → Billing.

Question 24

How do I get technical support or provide feedback?

Accepted Answer

You can provide feedback or seek help through our email support@booktranslator.app, and we will reply as soon as possible.

Question 25

Can I request a refund if I am not satisfied with the translation result?

Accepted Answer

If you are not satisfied with the translation result, you can contact us by email to request a refund. We will provide refund support based on the situation.

Question 26

What should I do if I'm not satisfied with the translation quality?

Accepted Answer

If you are not satisfied with the translation quality, please help us improve by providing feedback. To get assistance: 1) Go to your Translation History, 2) Find the task with translation issues, 3) Click the three dots menu (⋯) next to the task, 4) Select "Copy Task ID" to copy your task identifier, 5) Email us at support@booktranslator.app with your Task ID and describe the specific issues you encountered. Our team will review your case and work to resolve the problem or provide a refund if appropriate.

Question 27

Where can I find my translated book?

Accepted Answer

Once your translation is complete, you can find it on the Translation History page. If you are logged in, go to History in the navigation menu to see all your completed and in-progress translations. You can download the translated file directly from there. We also send an email notification with the download link when your translation is ready, so check your inbox (and spam folder) as well.

Question 28

I paid for a translation but can't find it in my history. What happened?

Accepted Answer

Your translated book is linked to the account you were using when you uploaded and paid for the translation. If you uploaded a book before signing in and then created an account or logged in afterward, the translation may be associated with your earlier guest session instead of your logged-in account. To find it, try signing out — your guest translations will appear on the History page. To avoid this in the future, always sign in before uploading and paying for a translation so that all your books appear in one place.

Question 29

How does BookTranslator ensure the security of my data?

Accepted Answer

We attach great importance to user privacy and security. For books uploaded to BookTranslator, we encrypt the transmission and store them securely. We will not disseminate, copy, or sell user-uploaded books without permission. The books uploaded by users are only used for translation services.

Question 30

Does BookTranslator keep my submitted translation records?

Accepted Answer

In order for users to download and share translated books at any time, BookTranslator will keep your translation results and records on the server. However, you can choose to delete this record in the local application, and we will also delete it synchronously on the server. We promise not to disclose user-submitted book information to third parties.

Question 31

Will my content be used to train AI models?

Accepted Answer

No. Your uploaded files and translated content are never used to train AI models. We use third-party AI services for translation processing only, and your content is handled temporarily during translation and then deleted from the translation pipeline. We do not store, share, or use your content for any purpose other than delivering your translation.

Question 32

Who owns the translated file?

Accepted Answer

You retain full ownership of both your original file and the translated output. BookTranslator does not claim any rights to your content or translations. The translated file is yours to use, distribute, or publish as you see fit, subject to the copyright status of the original work.

Question 33

What happens to my file and email address after translation?

Accepted Answer

Your uploaded files and translation results are kept on our servers so you can download them at any time from your translation history. You can delete your translation records from your account, and we will remove the files from our servers as well. Your email address is used only for account management and translation notifications — we never share it with third parties or send marketing emails without your consent.

Question 34

Can I translate password-protected or encrypted files?

Accepted Answer

Password-protected PDFs and encrypted files cannot be translated directly. You'll need to remove the password protection first using your PDF editor or file manager, then upload the unprotected file. This is a security measure — we cannot and do not attempt to bypass document encryption.

Question 35

What books can I submit for translation?

Accepted Answer

Users need to ensure that they have the corresponding copyright or authorization to use our translation services. This may include purchasing legitimate books, obtaining permission from publishers, etc. We will not be responsible for any copyright disputes arising from the dissemination and profit-making of translated books without copyright or authorization through our software services.

Question 36

Can I disseminate the translated book?

Accepted Answer

The translated book is still subject to the original copyright protection and is limited to personal learning purposes. Without the permission of the copyright holder, users shall not use the translated book for commercial purposes or dissemination.

Question 37

I found that someone used BookTranslator's translation service, and without my permission, translated and disseminated the book I published for profit. How to deal with this situation?

Accepted Answer

If you find that others have infringed your copyright through our software, please contact us in time and provide relevant proof materials. After verifying the situation, we will take appropriate measures, such as deleting infringing content, banning infringing users, etc.

Question 38

How can I translate a whole book?

Accepted Answer

You can translate an entire book using AI-powered tools like BookTranslator. Simply upload your PDF, EPUB, or DOCX file, select your target language from over 100 options, and receive a fully translated book in minutes. The AI translation engine preserves all original formatting, including images, tables, headers, footnotes, chapters, and page layout — so the translated book looks exactly like the original. Before committing to a full translation, you can preview a sample of the first few pages to check quality. BookTranslator uses advanced large language models similar to ChatGPT but purpose-built for document translation. Unlike manual copy-paste methods, it handles the entire book automatically from start to finish. The translated output is delivered as a downloadable file in the same format you uploaded, ready to read, print, or share. No software installation is required — everything runs in your browser.

Question 39

Can I pay someone to translate a book for me?

Accepted Answer

Yes, you have several options for paying to translate a book. Professional human translators typically charge $0.05-$0.20 per word, meaning a standard 70,000-word book costs $3,500-$14,000 and takes weeks or months to complete. Translation agencies offer project management but add overhead costs. For a faster, more affordable alternative, AI book translation services like BookTranslator can translate a full book in minutes for a fraction of the cost while preserving all formatting and layout. With BookTranslator, you upload your file, choose the target language, and receive the translated book as a downloadable document. The AI handles over 100 languages and maintains the original structure, including images, tables, and chapters. Many authors and researchers use AI translation for initial drafts, then have a human editor review the result. This hybrid approach combines speed and affordability with human-level accuracy for important projects.

Question 40

Can ChatGPT translate a full book?

Accepted Answer

ChatGPT can translate text, but it has significant limitations for full book translation. Its input window restricts how much text you can process at once, so you would need to copy and paste chapters manually — a tedious process that loses all formatting, images, tables, and page layout. ChatGPT also lacks context continuity between sessions, which can lead to inconsistent terminology across chapters. Dedicated book translation tools like BookTranslator use similar advanced AI models but are purpose-built for document translation. They handle the entire book automatically in one step, preserving structure, formatting, footnotes, headers, and producing a ready-to-read translated file. BookTranslator supports PDF, EPUB, and DOCX formats with over 100 target languages. The output maintains the exact same layout as your original document, so you get a professionally formatted translated book without any manual reformatting work.

Question 41

How much does it cost to translate a book?

Accepted Answer

The cost to translate a book varies significantly by method. Professional human translators charge $0.05-$0.20 per word, putting a typical 70,000-word book at $3,500-$14,000, with delivery times of several weeks to months. Translation agencies may charge even more due to project management overhead. AI translation services like BookTranslator are dramatically more affordable — pricing is based on document length, and a full book translation typically costs just a few dollars. You can upload your file to see the exact price before paying, with no hidden fees or subscriptions required. BookTranslator preserves all original formatting, images, and layout, so you receive a ready-to-read translated book. For academic papers, research documents, or personal reading, AI translation offers the best value. For publishing-grade translations, many authors use AI for a fast initial draft and then invest in professional editing — saving 60-80% compared to full human translation.

FAQ

Translation Function