Translator

An Android translator app that performs text and image translation entirely offline using on-device models.

It supports automatic language detection and transliteration for non-Latin scripts. Additionally, there is a built-in word dictionary.

How It Works

Complete offline translation — download language packs once and translate indefinitely without an internet connection.

Language packs contain the full translation models, so all translation happens on your device with no requests sent to external servers.

Tech

- Translation models are Firefox' translations models - OCR models are PaddleOCR (with Tesseract for unsupported langs) - Automatic language detection is done via cld2 - Dictionary is based on data from Wiktionary, exported by Kaikki - For Japanese specifically, there's a second "word dictionary" (Mecab) for transliterating Kanji - TTS uses Piper, Coqui, Kokoro, MMS, Sherpa ONNX, Mimic3 voices - PDF surgery uses mupdf and lopdf - Inference engines are: - Translation models: slimt - Paddle OCR, Kokoro TTS: MNN - Other TTS: OnnxRuntime

Features & How to Use

- Translate text How to trigger: Share text from any app, or type directly

- Translate text (mini popup) How to trigger: Long-press text on any app -> tap "Translate" in the copy/share bar

- Translate a URL How to trigger: Share a link from any app

- Translate an image How to trigger: Share an image from any app

- Translate a document How to trigger: Open the documents tab inside the app

- Dictionary lookup How to trigger: Long-press a word inside the app

- Change TTS voice / speed How to trigger: Long-press the play button

License

GNU General Public License v3.0