DualBook 8 languages

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Translate a Portuguese book into English

Upload a Portuguese EPUB and get the first fifteen pages back in English. Portuguese dialogue is often marked with a dash rather than quotation marks, and getting that back into English shape is the first thing a translation has to do right.

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

In most Portuguese novels a line of speech opens with an em dash and simply runs on. English expects quotation marks, and the boundary between what was said and what the narrator adds is not always marked in the original the way English needs it to be. Read that wrong and the narrator's aside ends up inside the character's mouth — an error that reads perfectly fluently and is completely wrong.

Underneath that is the usual flattening: Portuguese carries formality in its verb forms and English has one "you". And some words carry more than their definition — saudade being the famous one, but a book is full of smaller cases where a single Portuguese word needs an English phrase.

The model reads the entire book first and builds a guide — names, recurring terms, tone, narrative voice — so those choices are made once and held rather than re-invented every few pages.

How it works

  1. Choose your Portuguese EPUB

    A DRM-free EPUB. The file stays on your device; only the text of the sample is sent.

  2. The model reads the whole book

    Names, nicknames and recurring terms are collected first, so the same person is not introduced twice.

  3. The first 15 pages come back in English

    About 4,500 words as a complete EPUB, with dialogue converted to English quotation conventions.

Honest limits

Formality is flattened. English has one "you". Where the Portuguese marks distance in its verbs, the English has to carry it in tone, and some of it does not survive.

Some words become phrases. Where no English word exists, the translation says what the Portuguese means rather than leaving it untranslated — which is longer and blunter than the original.

Fifteen pages, not the book. About 4,500 words.

The text is sent to a server and discarded when the job finishes.

Questions

Does it handle dash-marked dialogue?

Yes, and it is one of the specific things to check in the sample. Portuguese marks speech with a dash and lets the narrator's words continue on the same line; English needs quotation marks and a clear boundary, so the translation has to work out where the speech actually ends.

Does it work on both Brazilian and European Portuguese?

Yes. The differences — gerund versus infinitive constructions, pronoun placement, everyday vocabulary — are recognised rather than misread, and reading the whole book first is what makes that reliable across a long text.

What happens to words like saudade?

They are translated into what they mean in that sentence rather than left in Portuguese and italicised. A word that recurs gets the same English treatment every time, which is the part that matters over a whole book.

How much is free?

About 4,500 words, roughly fifteen pages, five books a day.

Read the whole book

The app translates the entire book and can show the English beside the Portuguese, so the original stays there when one word will not fit into one word.

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