DualBook 8 languages

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Make an English-Arabic bilingual book

Each English paragraph with its Arabic translation directly beneath it, in one EPUB — and the two blocks read in opposite directions, which is the part most bilingual files get wrong.

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

A page that stacks English on Arabic is a bidirectional document, and that is a real technical condition rather than a styling preference. The English paragraph starts at the left edge; the Arabic paragraph must start at the right one, with its punctuation at the correct end. Unicode will order the letters correctly on its own, which is precisely why this failure is easy to miss — the text looks fine and is aligned to the wrong side.

So every inserted Arabic paragraph carries its own direction and language attributes, and the styling that marks it out is drawn on the right edge rather than the left. The English around it is untouched and stays left-to-right.

Your browser does the assembly. It opens the EPUB, walks each paragraph, inserts the Arabic beneath it inside the original file, and rewrites only the chapter documents that actually received a translation — so cover, navigation, stylesheet and metadata come through as they were.

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 and recurring terms are fixed once, so a transliterated name does not change spelling between chapters.

  3. Arabic is inserted under each paragraph

    Each Arabic block is marked right-to-left and tagged as Arabic, so a reader aligns it and punctuates it correctly.

  4. Read it here, or on any device

    A complete EPUB carrying the book's own fonts and stylesheets, with the English still reading left-to-right.

The trap, and the honest limits

Your eye will go to the Arabic. Read the English paragraph first, every time. The seconds of not understanding are the practice.

Modern Standard Arabic only. The translation reads more formally than colloquial speech, which is the register Arabic books are written in.

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

Does the Arabic align to the right?

Yes. Each inserted paragraph carries an explicit right-to-left direction and an Arabic language tag, and the styling that marks it is drawn on the right edge — because a left-edge rule sits at the end of an Arabic line rather than the start of it.

Which side should I read first?

English first, every paragraph. Sit with the confusion for a moment before you look down — that moment is where the reading practice actually happens.

Will it open on a Kindle?

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

Does the book's own layout get reversed?

No, and it should not be. The book is still an English book with Arabic added underneath, so its page order and stylesheet stay as the publisher made them. Only the Arabic blocks read right-to-left.

Do the cover and table of contents survive?

Yes. The browser rebuilds the archive entry by entry and only rewrites 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