[andrenatalbr]

Models are downloaded only once and then cached, and not repeatedly like the OP mentioned. Source: Me. I've developed it. If you disagree, are seeing a different behavior or have further questions, please reach out in the repo: github.com/mozilla/firefox-translations/

[taneq]

Thanks once for the response, and eleventy times for actually developing a non-cloud translation thingy. As for the caching thing I was really hoping this was the case so I guess that makes it three.

[autoexec]

Good to know! I still hope you can find a better place to host the files, but it's nice knowing the problem only happens once per file (so long as the cache remains anyway)