How to create a translation
Copy en_us.json from Refined Storage GitHub repository to a text file on your computer and replace the texts with your language.
How to submit your translation
If you know Git well enough, you can contribute new language files via a pull request.
If you do not know how to use Git/GitHub, upload the translation file to Pastebin or Gist and send it to me through a GitHub issue.
Updating existing translations
You can compare the new and removed translation keys yourself, or use a Bash script that outputs a diff between
en_US and the version specified.
You can, of course, always diff manually using another tool, like the
diff utility or an online diffing tool.