Open the Technic Launcher and click the 'Launcher Options' Button in the upper right corner. (Please note the space at the beginning of the string, it is required)Īt the end click the save button and start your game.

Add ' -Duser.language=en untry=US' to the end of 'JVM arguments'. Minecraft Vanilla Launcher:ġ) Open the Minecraft Vanilla Launcher and switch to the 'Installations' tab. Click the profile for your modpack and select 'MORE OPTIONS'. Here are some tutorials for some launchers to add these parameters. What you do by adding the Java parameters is to tell Java to use another default language. But if it does not work for you or the modpack launcher you're using does not support adding additional Java parameters you have to try the second option.Īdd additional Java parameters to your launcher We recommend the first as it has less impact on the rest of the computer. Add additional Java parameters to your launcher.Right now we are aware that this problem occurs with computers that use the Turkish language. Windows) and the language that it is set to.

This problem could be caused by your operating system (e.g. You're probably here because you can not join your Aternos server which has a modpack installed because of the error message 'ID XXXX mismatch between world and game' or similar error messages.

Minecraft launcher java arguments