Moses, the machine translation system.

Moses is a statistical machine translation system that allows you to automatically train translation models for any language pair. All you need is a collection of translated texts (parallel corpus). Once you have a trained model, an efficient search algorithm quickly finds the highest probability translation among the exponential number of choices.

Moses @ GitHub.

Free and Open Source Machine Translation API. Self-hosted, offline capable and easy to setup.

Unlike other APIs, it doesn't rely on proprietary providers such as Google or Azure to perform translations. Instead, its translation engine is powered by the open source Argos Translate library.

LibreTranslate @ GitHub