Configuring Self-Hosted LibreTranslate in Weblate via Docker

[SethFalco]

I needed this for my instance, and was pleasantly surprised at how quick / simple it quick be to extend. Originally I thought it'd be more involved. Just sharing here for future me, or anyone that may find themselves over complicating things.

To add self-hosted LibreTranslate to Weblate, one can literally just include an extra service in docker-compose.override.yml. The default settings are cool too, since it won't be accessible to the public. 👍

docker-compose.override.yml

services:
  weblate:
    image: weblate/weblate:5.13.3.1
    environment:
      …
    ports:
      …
  libretranslate:
    container_name: libretranslate
    image: libretranslate/libretranslate:v1.7.3-cuda
    command: --disable-web-ui
    environment:
      LT_UPDATE_MODELS: True
      PUID: root
    volumes:
     - ./libretranslate_db:/app/db
     - ./libretranslate_data:/root/.local:rw
    deploy:
      resources:
        reservations:
          devices:
            - driver: nvidia
              count: 1
              capabilities: [gpu]

This runs a LibreTranslate instance along with Weblate, it's only the API, and it can only be accessed via its service name within the docker network.

Then do docker compose down && docker compose up -d.

Finally, go to /manage/machinery/libretranslate and point to your LibreTranslate instance. The API URL is http://libretranslate:5000, leave API key blank.

And that's it, LibreTranslate is configured. 🎉

[nijel]

Great, let's add this to the documentation. I wanted to test Copilot to create the pull request based on this content. But as usual, I've spent more time fixing the output than I would have spent writing this myself… Anyway, the pull request is at #16282, review is welcome.