Argos Translate

Offline translation is the whole point of Argos Translate, a Python library and CLI that runs neural machine translation entirely on the local machine. It builds on OpenNMT with a CTranslate2 inference backend and distributes trained models as installable language packs covering more than 35 languages; when a direct pair is missing, it pivots automatically through an intermediate language, so Spanish to French works with only Spanish-English and English-French packs installed, at some cost in quality. Everything installs with pip install argostranslate, a separate argostranslategui package adds a desktop interface, and setting the ARGOS_DEVICE_TYPE environment variable to cuda or auto enables GPU acceleration, though CPU inference is the default and works fine. The project is dual licensed under MIT or CC0, has about 6,300 stars, and documents its API on Read the Docs. Its highest-profile deployment is LibreTranslate, which wraps it in a self-hosted web API, and privacy-sensitive applications choose it because no text ever leaves the machine.