Machine Translation done locally in your browser.

No need to send your translations out to the cloud. The Bergamot project implements free client-side translation software as a web extension for the open source Mozilla Firefox Browser

Install the Extension


Unlike cloud-based alternatives, translation is done locally using machine learning optimized for consumer hardware


The text being translated is never sent to a third party so your viewing history remains confidential and private


The consortium publishes models in more than a dozen languages, including English, Spanish, German, and Italian.

The Bergamot Project Consortium is coordinated by the University of Edinburgh with partners Charles University in Prague, the University of Sheffield, University of Tartu, and Mozilla. This project has received funding from the 🇪🇺 European Union’s Horizon 2020 research and innovation programme under grant agreement No 825303.

Consortium Partners

What languages do you support?

Bergamot, like all modern translation software, supports language pairs. Translation happens from one language to another language. The full set of released pairs can be veiwed alongside a standardized quality metric on our benchmarks report

How can I use Bergamot software?

The easiest way to use the Bergamot translation software is through the Firefox Translations Extension. Developer and researchers may be interested in the software libraries and training utilities developed by Bergamot, published as open-source software. Learn more about it in the software section.

How can I contribute?

The best way to contribute to the project is to use the Firefox Translations Extension, translate one or more pages, and take the survey from the extension's toolbar to tell us about the experience. If you are comfortable using GitHub you can also file issues against the extension's repository. For a more informal discussion, there is also a Firefox Translations channel on Mozilla's public Matrix chat server.

The software page has links to many repositories of open source code developed or used by the project with their own issues and contributor policies