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Open-source offline translation library written in Python

Argos Translate uses OpenNMT for translations, SentencePiece for tokenization, Stanza for sentence boundary detection, and PyQt for GUI. Argos Translate can be used as either a Python library, command-line, or GUI application. LibreTranslate is an API and web-app built on top of Argos Translate.

Argos Translate supports installing model files which are a zip archive with a ".argosmodel" extension with the data needed for translation.

Argos Translate also manages automatically pivoting through intermediate languages to translate between languages that don't have a direct translation between them installed. For example, if you have a es ➔ en and en ➔ fr translation installed you are able to translate from es ➔ fr as if you had that translation installed. This allows for translating between a wide variety of languages at the cost of some loss of translation quality.

Arabic, Azerbaijani, Chinese, Czech, Dutch, English, Esperanto, Finnish, French, German, Greek, Hindi, Hungarian, Indonesian, Irish, Italian, Japanese, Korean, Persian, Polish, Portuguese, Russian, Slovak, Spanish, Swedish, Turkish, Ukranian, Vietnamese

• Request a language

GUI

• Browse models
• P2P download (IPFS and BitTorrent)
• Training scripts
• Google Drive download

Argos Translate is available from PyPI and can be easily installed or updated with pip.

pip3 install argostranslate

Install GUI:

pip3 install argostranslategui

1. Download the latest macOS release.
2. Extract the archive.
3. Copy the .app file to the Applications directory.

Download a copy of this repo and install with pip.

git clone https://github.com/argosopentech/argos-translate.git
cd argos-translate
pip install -e .

from argostranslate import package, translate

# Install .argosmodel package
package.install_from_path('en_es.argosmodel')

installed_languages = translate.get_installed_languages()

# >>> [lang.code for lang in installed_languages]
# >>> ['en', 'es']

translation_en_es = installed_languages[0].get_translation(installed_languages[1])
translation_en_es.translate("Hello World!")

# >>> '¡Hola Mundo!'

const res = await fetch("https://translate.argosopentech.com/translate", {
	method: "POST",
	body: JSON.stringify({
		q: "Hello!",
		source: "en",
		target: "es"
	}),
	headers: {
		"Content-Type": "application/json"}
	});

console.log(await res.json());

{
    "translatedText": "¡Hola!"
}

The GUI code is in a separate repository.

To enable GPU support, you need to set the ARGOS_DEVICE_TYPE env variable to cuda or auto.

$ ARGOS_DEVICE_TYPE=cuda argos-translate --from-lang en --to-lang es "Hello World"
Hola Mundo

The above env variable instructs CTranslate2 to use cuda. if you encounter any issues with GPU inference please reference the CTranslate2 documentation.

Run the GUI version of Argos Translate.

argos-translate-gui

When installing with snap a .desktop file should also be installed which will make Argos Translate available from the desktop menu.

Languages are chosen as drop down choices. More languages pairs can be installed.

The left text box translates into the right box.

Example workflow translating from Vietnamese into English:

1. Set the left drop down to Vietnamese and the right drop down to English.
2. Replace the default text Text to translate from in the left text box with some text in Vietnamese. A quick way to do this is to click in the left text box and press the keyboard shortcut CTRL+a to select all and then CTRL+v to paste.
3. Wait patiently.
4. When text appears in the right text box, read the translation!

If the output looks similar to the input, try changing the origin language as some languages appear similar if you are unfamiliar with them.

Run the command line version of Argos Translate.

argos-translate

Translate a string from English to Spanish.

Note: If you do not have the language pair that you are calling installed, you will get a Traceback error.

argos-translate --from-lang en --to-lang es "Hello World."
Hola Mundo

Translate longer text piped into argos-translate.

echo "Text to translate" | argos-translate --from-lang en --to-lang es
Texto para traducir

The translate-html library is built on top of Argos Translate and Beautiful Soup and parses and translates HTML. The LibreTranslate API also has support for translating HTML.

The argos-translate-files library is built on top of Argos Translate and parses and translates files. The LibreTranslate API also has support for translating files.

If you want to uninstall Argos Translate, you may choose the applicable method.

If you installed Argos Translate via pip you can uninstall it using

python3 -m pip uninstall argostranslate

You may choose to also delete temporary and cached files:

rm -r ~/.local/cache/argos-translate
rm -r ~/.local/share/argos-translate

The following command will uninstall the snap package.

sudo snap remove argos-translate argos-translate-base-langs

If you installed additional language packs, you might want to remove them as well, e.g.

sudo snap remove argos-translate-de-en

Language pairs are on average 100MB each.

1. Open Argos Translate: argos-translate-gui
2. Click on the Manage Packages menu item.
3. Click on the Download packages button.
4. Click on the down arrow beside a language pair that you want to add.
5. Wait for the hourglass icon to change into a check mark icon.
6. Repeat the last two steps until you have all of the language pairs that you want.
7. Click on the X in the top right to close the Download packages window.
8. Click on the X in the top right to close the Manage Packages window.

Note: The Download packages screen does not seem to have a scroll bar so you will probably need to follow the next set of instructions to import new pairs through the GUI.

1. Download or make new pairs. Model links can be downloaded from this page or this JSON file.
2. Open Argos Translate: argos-translate-gui
3. Click on the Manage Packages menu item.
4. Click on the Install package file button.
5. Navigate to where you downloaded the new language pairs, click on the .argosmodel file, and click on the Open button.
6. Repeat the last two steps until you have all of the language pairs that you want.
7. Click on the X in the top right to close the Manage Packages window.

1. Update list of available language pairs: argospm update
2. List all available language pairs: argospm search
3. Install new pair syntax: argospm install *lang_pair_name*

For example, install Turkish to English pair: argospm install translate-tr_en

Optionally, you could install all language pairs using BASH.

for i in $(argospm search | sed 's/:.*$//g'); do argospm install $i ; done

1. Open Argos Translate: argos-translate-gui
2. Click on the Manage Packages menu item.
3. Click on the trash can icon besides the pair you want to remove.
4. Click on the X in the top right to close the Manage Packages window.

1. Remove the Turkish to English pair: argospm remove translate-tr_en

Optionally, you could remove all language pairs using BASH if you need to free space fast.

for i in $(argospm list); do argospm remove $i ; done

• LibreTranslate-py - Python bindings for LibreTranslate
• machinetranslation.io - OpenNMT based translation and articles on machine translation
• LibreTranslate-rs - LibreTranslate Rust bindings
• LibreTranslate Go - LibreTranslate Golang bindings
• LibreTranslator - LibreTranslate Android app
• Lexicon - Translation API.

Contributions are welcome! Available issues are on the GitHub issues page. Contributions of code, data, and pre-trained models can all be accepted.

For support please use the LibreTranslate Forum or GitHub Issues.

For questions about CTranslate2 or general machine translation research the OpenNMT Forum is a good resource.

Custom models trained on your own data are available for $1000/each (negotiable).

Managed hosting for $1000/mo.

If you find this software useful donations are appreciated.

• GitHub Sponsor
• PayPal
• Bitcoin: 16UJrmSEGojFPaqjTGpuSMNhNRSsnspFJT
• Ethereum: argosopentech.eth
• Litecoin: MCwu7RRWeCRJdsv2bXGj2nnL1xYxDBvwW5
• Bitcoin cash: qzqklgjpgutdqqlhcasmdd2hkqcelw426sxzk5qtne
• Filecoin: f1nrnpmjxn27amidyiqrzq5mxihdo2trh2oijw2sq
• Basic Attention Token: 0x8a16f26D277f924B04FCA5ECec64b76B5410A06c
• Cheap Eth: 0x996133E61b81c300a37ACa9b24898685eB872b61

Paid supporters receive priority support.

You can also support the project by purchasing DigitalOcean hosting with the Argos Open Tech referral link which helps to offset CDN hosting costs.

Dual licensed under either the MIT License or CC0.