
Modrinth · Minecraft mod
LangSwitch
Instantly toggle Minecraft's UI language with one key — no reload, no menu diving. Switch between your language and the one you're learning even while a GUI (inventory, books) is open. Perfect for language learners comparing translations.
Quick answer
Which LangSwitch release matches 1.21.4 Forge?
LangSwitch 1.0.0 targets 1.21.4 with Forge. It must be installed on the client. Do not install it on the dedicated server. No extra mods listed for this file.
Where it goes
Is LangSwitch required on the client, server, or both?
It must be installed on the client. Do not install it on the dedicated server.
This file is marked client-only.
What else does LangSwitch 1.0.0 need?
1.0.0 on 1.21.4 Forge. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add LangSwitch without breaking your instance.
Built for LangSwitch 1.0.0 on 1.21.4 Forge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.0.0. It targets 1.21.4 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
It must be installed on the client. Do not install it on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.0.0. It opens that exact file at the source.
About this project
What does LangSwitch add?
LangSwitch
Instantly switch the game's display language with a single key press.
Vanilla Minecraft's Options → Language menu triggers a full resource reload every time you switch, causing a noticeable multi-second stutter. LangSwitch skips that reload entirely, so the language changes instantly with effectively zero load time.
Features
- One-tap language toggle: press your configured toggle key to switch between your chosen target language and whichever language you were just using
- Instant, load-free switching: swaps only the language data directly instead of triggering a full resource-pack reload, so there's virtually no delay
- Works even with a GUI open: the toggle key still works while inventories, books, chests, etc. are open — great for comparing translations while playing (ideal for language learning)
- Ctrl-modifier to prevent misfires: the toggle key only fires when held together with Ctrl, so it won't accidentally trigger while typing in chat or on a sign
- Google Translate–style searchable language picker: pick your target language from a searchable list instead of hunting through raw language codes
- Dedicated config keybind: registered in the vanilla key-binding menu, so you can always reopen the settings screen to change anything
How to use
- Press the key that opens the settings screen (default: J)
- Click "Toggle key" and press any key to bind it (fires as Ctrl + that key)
- Click "Switch to" and search for/select your target language
- In-game, hold Ctrl and press your bound key to instantly toggle between your target language and whatever language you were using
Supported environment
- Client-side only (no server-side install required)
- Supported loaders: Forge / NeoForge / Fabric
- Supported versions: 1.20.1 through 1.21.11
Project description from Modrinth.
Pick your setup
LangSwitch by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.11
2 loader builds1.21.10
2 loader builds1.21.8
3 loader builds1.21.5
3 loader builds1.21.4
3 loader builds1.21.3
3 loader builds1.21.1
3 loader builds1.20.6
3 loader buildsShowing the newest 12 of 15 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
LangSwitch versions and loaders
1.0.0
LangSwitch-forge-1.21.4-v1.0.0.jar
11 Jul 2026
Looking for an older file? The official Modrinth project page is in Resources.