
Fabric Language Kotlin Mod is a dependency rather than something you notice in game: it lets Fabric mods written in Kotlin run, by bundling the Kotlin runtime and libraries and allowing a Kotlin object to act as a mod’s main class. It adds no blocks, items or world changes of its own. You install it because another mod listed it, and because it only leans on Fabric Loader it works the same whatever Minecraft version you are on.

Features:
- Lets Fabric mods written in Kotlin load and run instead of failing at startup.
- Bundles the Kotlin runtime and standard libraries, so each mod does not have to ship its own copy.
- Allows a Kotlin object to be named as a mod’s main class, which is what Kotlin mods expect.
- Adds no content: no blocks, no items, no recipes and no world generation changes.
- Depends only on Fabric Loader, so the same build works across Minecraft versions.
- Carries Kotlin coroutines and serialization as well, which the mods relying on it often use.
- Fabric only, and one of the most widely installed library mods on the loader.
How to Use:
- Install Fabric Loader for the Minecraft version you play.
- Drop this jar into
.minecraft/modsalongside the mod that asked for it. - Start the game. There is nothing to set up and no config file to edit.
- If a Kotlin mod still fails to load, check its notes for the version of this library it needs and match it.
Fabric Language Kotlin Mod Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on the file's original source — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Fabric Language Kotlin Mod (26.2, 1.20.1) – Library for modmuss50's Mods is a free Minecraft Java mod. Compatible with Minecraft 1.20.1. Download it and open it directly in the game.