There is a special edition of TiddlyWiki that simplifies creating and maintaining translations:

• https://tiddlywiki.com/editions/translators/ to translate current version of TiddlyWiki
• https://tiddlywiki.com/prerelease/editions/translators/ to translate latest prerelease version of TiddlyWiki

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.