DualBook 8 languages

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Translate a Spanish book into English

Upload a Spanish EPUB and get the first fifteen pages back in English. The hard part of this direction is not vocabulary — it is that Spanish encodes things English has no slot for, and someone has to decide where that information goes.

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

Spanish tells you, in the verb ending of every sentence, exactly how formal the speaker is being. English does not have that dial. When a character switches from usted to tú mid-conversation — a real moment in a Spanish novel, sometimes the whole point of the scene — an English translation has to carry it in word choice and rhythm instead, or lose it entirely.

Names are the other trap. Spanish books are full of diminutives: Francisco becomes Paco, José becomes Pepe, Concepción becomes Conchita. To a reader who does not know the convention, those look like four different people. The guide written from the whole book maps them to one person before the translating starts.

The mechanical consequence: English comes out noticeably shorter than the Spanish it came from, usually by 15–20%.

How it works

  1. Choose your Spanish 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

    Every name, nickname and diminutive is collected first, so Paco and Francisco are recognised as one man.

  3. The first 15 pages come back in English

    About 4,500 words of the Spanish, as a complete EPUB you can download or read here.

Honest limits

Formality gets flattened. English has no usted. A good translation carries it in tone; no translation carries all of it. If the usted/tú switch is the point of a scene, read the Spanish too.

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

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

Questions

Will it recognise nicknames as the same character?

Yes, and that is one of the reasons it reads the entire book before translating anything. Paco/Francisco, Pepe/José, Charo/Rosario — the guide records them as one person, so the English does not silently introduce a new character.

What happens to usted?

It becomes tone rather than grammar: sentence length, word choice, how a line is addressed. That is what a human translator does too. It is an approximation, and the page says so rather than pretending otherwise.

Does it work on Latin American and Peninsular Spanish equally?

Yes. The variety of the source does not change how it is read — what matters is that vosotros forms, regional vocabulary and local idioms are recognised, and reading the whole book first is what makes that reliable.

How much is free?

About 4,500 words, roughly fifteen pages, five books a day. The English version will look shorter on the page than the Spanish did, because English is a more compact language.

Read the whole book

The app translates the entire book and can show the English beside the Spanish, so you keep the original when the translation flattens something.

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