Minecraft version

1.20.x

Default World Type version

1.20.1-4.0.4

NeoForge version

20.4.239

The latest.log file

https://mclo.gs/68JD4Mp

Issue description

Trying to use the latest 1.20.X jar on NeoForge 1.20.4 results in the mod not being loaded correctly. It is worth mentioning that both Forge 1.20.1, Forge 1.20.4, and NeoForge 1.20.1 work properly, so this seems to be an issue unique to NeoForge 1.20.4

This seems to be the key issue:

[22:09:57.309] [main/ERROR] [loading.LanguageLoadingProvider/LOADING]: Missing language javafml version [47,) wanted by DefaultWorldType-1.20.1-4.0.4.jar, found 2.0 

Steps to reproduce

1. Create a new NeoForge 1.20.4 instance
2. Add the latest DefaultWorldType 1.20.1-4.0.4
3. Launch the Game

Expected Result: DefaultWorldType would be loaded
Actual Result: DefaultWorldType is not loaded, with logs showing an error during loading it

Other information

No response

NeoForge is not supported in 1.20.4. It's supported in 1.20.1 until it isn't because of changes they made it incompatible with Forge mods compatible with version 47.1.3 and fully compatible in version 1.21 and higher. For me, it's not worth it to port it to 1.20.4 NeoForge.