Argos Translate
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Open-source offline translation library written in Python
Argos Translate uses OpenNMT for translations and can be used as either a Python library, command-line, or GUI application. Argos Translate supports installing language model packages which are zip archives with a ".argosmodel" extension containing the data needed for translation. LibreTranslate is an API and web-app built on top of Argos Translate.
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.
Supported languages
Arabic, Azerbaijani, Catalan, Chinese, Czech, Danish, Dutch, English, Esperanto, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Irish, Italian, Japanese, Korean, Persian, Polish, Portuguese, Russian, Slovak, Spanish, Swedish, Turkish, Ukrainian, and more
Request a language
Installation
Install with Python
Argos Translate is available from PyPI and can be easily installed or updated with pip.
pip install argostranslate
Install GUI:
pip install argostranslategui
Installation for macOS
- Download the latest macOS release.
- Extract the archive.
- Copy the
.app
file to the Applications directory.
Python source installation into virtualenv
Download a copy of this repo and install with pip.
git clone https://github.com/argosopentech/argos-translate.git
cd argos-translate
virtualenv env
source env/bin/activate
pip install -e .
Examples
import argostranslate.package
import argostranslate.translate
from_code = "en"
to_code = "es"
argostranslate.package.update_package_index()
available_packages = argostranslate.package.get_available_packages()
package_to_install = next(
filter(
lambda x: x.from_code == from_code and x.to_code == to_code, available_packages
)
)
argostranslate.package.install_from_path(package_to_install.download())
translatedText = argostranslate.translate.translate("Hello World", from_code, to_code)
print(translatedText)
Command Line Interface
argospm update
argospm install translate-en_de
argos-translate --from en --to de "Hello World!"
# Hallo Welt!
Install all translation packages:
argospm install translate

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!"
}
Graphical user interface
The GUI code is in a separate repository.

GPU Acceleration
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 passes the device type to CTranslate2.
HTML Translation
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.
Files Translation
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.
Uninstall
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
Related Projects
Contributing
Contributions are welcome! Available issues are on the GitHub issues page. Contributions of code, data, and pre-trained models can all be accepted.
Support
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.
Services
Custom models trained on your own data are available for $1000/language (negotiable).
I am also available for hire to do support, consulting, or custom software development.
Donate
If you find this software useful donations are greatly appreciated and help to make this project sustainable.
- GitHub Sponsor
- PayPal
- Bitcoin: 16UJrmSEGojFPaqjTGpuSMNhNRSsnspFJT
- Ethereum: argosopentech.eth
- Litecoin: MCwu7RRWeCRJdsv2bXGj2nnL1xYxDBvwW5
- BCH: bitcoincash:qzvpxe8y5kq45kahqkyv3p88sjrhlymj2v6xdrj3cv
Paid supporters receive priority support.
Hosting affiliate links
You can help support Argos Translate financially by purchasing hosting through these referral links:
Argos Translate 2 beta
A beta version of Argos Translate 2 is available to install from source from the v2 branch on GitHub. Argos Translate 2 has a multilingual model architecture, more extensive unit testing, and a more experimental orientation.
Contributing
Contributions are welcome! Bug reports, pull requests, documentation writing, and feature ideas are all appreciated.
License
Argos Translate is dual licensed under either the MIT License or Creative Commons CC0.