Kottle is the library for some Minecraft mods. Mod creators need it to use the Kotlin language. The library itself does not add anything to the game and you do not need to install it separately. An analogue for earlier versions of the game is Shadowfacts’ Forgelin.
How to install Kottle library
- Make sure you have installed Minecraft Forge.
- Download the mod for your version of the game.
- Put it in the ‘mods’ folder, which is located in the game folder.