All translations are located in the src/main/resources/ directory. Some part partial translations, a few are fully translated.
If you want to translate the missing messages in a language, or add a translation for a new language, check out Wiki/Translating!
When translating, you can test out your messages by copying them into the messages.yml file for SkyWars.
To see all currently untranslated messages in all currently existing language files, go to Search/Untranslated.