How to translate ReCalendar to your language

Grab the *.json files from this folder: https://github.com/klimeryk/recalendar.js/tree/master/src/locales/en
They contain the strings that need to be translated to your language.
The format is simple: "key": "value". Key should not be translated, only value.
Check for existing issues for your language or open a new one and share the files there.

Copy the en folder from https://github.com/klimeryk/recalendar.js/tree/master/src/locales/ and rename it to the appropriate locale. It has to match the locale that day.js supports. The list is available here.
Translate the strings in each *.json file, as described in the above section.
Add your language to the English app.json file, language section. Add it as you'd write it in your language. See the existing examples there. So, for the Polish language I'd put Polski, not Polish. This follows best practices for language selectors.
You should now be able to see the language in your local, development version.
Check the console for any warnings or errors if the language is not visible or not working.

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