How to Localize a Language

If you're referring to the new version, the language files are stored as .json files in the "Data/StreamingAssets/Languages" folder. To create a new language, you can create a new file there. It's recommendable to just clone the en.json file and rename it to the new language (e.g. "fr.json" for French, "es.json" for Spanish etc).

To use the new language then, you can change the "Game_Language" value in the config.properties file (either enter the full name or the language code), e.g. "French" or "fr" etc.