A simple language gestion with XML in Unity Game Engine Very if you want to translate your game in other languages.
In the Asset folder in your unity project, create a Resources folder. In this Resources folder, create another folder named "Languages". In this folder, create as many folders as you want named after Languages (English, French, Spanish...). Be sure to name them after the Unity applicationLanguage convention if you want it to work (https://docs.unity3d.com/ScriptReference/SystemLanguage.html).
Create a new XML file with the same name in each folder. And put all the strings you want in!
Don't forget to put using LanguageModule on top of your C# script.
You can report or ask for anything in the Issues section