I’ve a simple static HTML+JS page that renders a translation UI by reading a JSON i18n file from a GitHub repo (can be any URL).
Demo: https://listmonk.app/i18n/
Source: https://github.com/knadh/listmonk-site/tree/master/i18n
Demo: https://listmonk.app/i18n/
Source: https://github.com/knadh/listmonk-site/tree/master/i18n
I created something similar, feel free to steal my UI ;)