There is a special edition of TiddlyWiki that simplifies creating and maintaining translations:
Note that no knowledge of Node.js or GitHub is required.
You can translate TiddlyWiki on Node.js, type tiddlywiki editions/translators --listen and visit http://127.0.0.1:8080/ in your browser.
See https://tiddlywiki.com/dev for technical details of creating and maintaining translations.