The worker files are distributed under the Mozilla Public License, version 2.0.
Package: @browsermt/bergamot-translator 0.4.9. The worker is shipped as released.
Source: https://github.com/browsermt/bergamot-translator
Exact package: https://registry.npmjs.org/@browsermt/bergamot-translator/-/bergamot-translator-0.4.9.tgz
License text: MPL-2.0.txt

The English–German translation models are provided by the Bergamot and Firefox
Translations projects. Model weights are downloaded on demand, checked against
the SHA-256 hashes in the official model registry and cached on this device.
The downloaded files contain model data only. Local translation receives the
document text inside a worker.
Official registry: https://bergamot.s3.amazonaws.com/models/index.json
Model information and source: https://github.com/mozilla/firefox-translations-models