DualBook 8 languages

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Make an English-Dutch bilingual book

Each English paragraph with its Dutch translation directly beneath it, in one EPUB. Read the English first — and if you are Dutch, that instruction is the whole product.

The first 15 pages of text are sent to our server to be translated. The file itself stays on your device.

Dutch readers generally do not need a translation to get through an English novel; they need a reason not to give up on the hard paragraphs, and a way to check the ones they half-understood. A parallel text supplies both without the thirty-second detour a dictionary costs. The point is not comprehension but staying in the book.

Your browser opens the EPUB, walks each paragraph and inserts the Dutch beneath it as a sibling paragraph inside the original file. Only the chapter documents that receive a translation are rewritten, so cover, navigation, stylesheet and metadata survive as they were.

The inserted paragraphs are styled to wrap, which matters because Dutch joins words English keeps apart and a long compound in a narrow phone column is what makes most hand-made bilingual files scroll sideways.

How it works

  1. Choose an English EPUB

    A DRM-free EPUB. The bilingual file is assembled in your browser, not on a server.

  2. The model reads the whole book

    Names, terms and the je/u map are fixed once, so the Dutch keeps its footing from chapter to chapter.

  3. Dutch is inserted under each paragraph

    Each translation is styled beneath its paragraph and set to wrap, so a long compound cannot overflow the page.

  4. Read it here, or on any device

    A complete EPUB carrying the book's own fonts and stylesheets.

The trap, and the honest limits

The trap is sharper for Dutch readers than for most. Because you can read the English, it is very easy to let the eye drop to the Dutch out of mild laziness and finish the book having practised nothing. Read the English paragraph first, every time, and look down only when it genuinely did not resolve.

Fifteen pages get translations. The rest of the book stays in English inside the same file.

The text is sent to a server and discarded when the job ends. The file never leaves your device.

Questions

Which side should I read first?

English first, every paragraph — and with this pair the discipline matters more than usual, because the Dutch is easy enough to fall into without noticing.

Is this useful if my English is already good?

That is the main case for it. The value is not in understanding the book but in not stopping: the two or three paragraphs per chapter that would have cost you a dictionary detour, answered in a glance so you stay inside the story.

Will it open on a Kindle?

Yes. Kindle has accepted EPUB directly since 2022; email the file to your device or copy it across.

Do the cover and table of contents survive?

Yes. The browser rebuilds the archive entry by entry and only rewrites the chapter files that received a translation, so everything else passes through untouched.

The whole book, in parallel

The app builds the bilingual version of the entire book, with tap-to-look-up and your reading position synced across devices.

Open DualBook