Bilingua: Bilingual Books EPUB

Learn a language by reading the books you love. Bilingua is a bilingual book reader: it opens your own EPUB and PDF books and shows every sentence with its translation right underneath. No more stopping to look things up. Just keep reading.

Translation runs on your phone, offline. No account, no tracking, no ads. And no subscription: try it free for 14 days, then pay once and keep it forever. It costs about the same as a single book.

LAUNCH PRICE until 31 December 2026. After that the price goes up.

WHY LEARNERS CHOOSE BILINGUA
✔ Your books, not a fixed catalogue. Any EPUB or PDF becomes a bilingual book.
✔ Offline sentence translation in 59 languages. Works on a plane.
✔ Pay once, the price of one book. No monthly fee, unlike most language reading apps.
✔ Two-way Anki sync. Words you save here become flashcards in AnkiDroid.

READ BILINGUAL BOOKS
• Parallel text: the translation under each sentence, on the same line, or hidden
• Hide-to-reveal mode: read first, tap to check the translation
• Read aloud: hear the book sentence by sentence, even with the screen off
• Want more fluent translations? Switch to DeepL, Google Translate, Azure AI or your own server

BUILD YOUR VOCABULARY WHILE YOU READ
• Long-press any word: meaning, pronunciation and the sentence it came from
• "Explain this word" gives short grammar notes
• Saved words are highlighted in every book until you know them, then they turn green
• Built-in flashcards with spaced repetition, like Anki, with a daily goal and reminder
• Send words to AnkiDroid with audio, or export an Anki file

A REAL EBOOK READER, NOT JUST A BILINGUAL APP
• Scroll or turn pages, volume-key page turns, e-ink friendly
• Light and dark themes, custom colours and fonts
• Highlights and notes, searchable across your library, export to Markdown
• Google Drive sync for books, words and reading position across devices
• Works with calibre, KOReader, Kobo sync, Hardcover and OPDS catalogues like Project Gutenberg

TRACK YOUR PROGRESS
Reading streaks, words per minute, words known and flashcard reviews, all in one Progress tab.

PRIVATE BY DESIGN
No account. No tracking. No ads. Offline translation never leaves your device. If you choose an online translator, the app tells you in plain words what is sent.

GREAT FOR
Learning Dutch, German, Spanish, French, English, Italian, Hungarian, Russian and more. Ideal if you use LingQ, Readlang or bilingual parallel text books and want something that works with your own library, offline, without a subscription.

TRY IT FREE
Start reading within a minute: two starter books and a short guide are included. The 14-day trial unlocks every feature, with up to two of your own books. Then unlock once. The purchase follows your Google account to your next phone.

Note: DRM-protected books cannot be opened. Scanned PDFs without a text layer cannot be translated.