This is where I'm using the CDN:
https://github.com/argosopentech/argospm-index/blob/main/ind...
R2 is easy to use. I think there's an API but I just manually upload files in the Cloudflare dashboard.
I had some issues with the default .dev domain Cloudflare gives you so I bought a custom domain. https://community.libretranslate.com/t/failing-to-download-f...