When the PC language is set to Turkish and you try to run a BetterMC the server, it is not able to start because of mavm, specifically with this error:

Seems to have problems with the name lucıa

Its the second time I've seen this reported on the Luna Pixel Studios' discord, the first time was also with Turkish and this was their log: https://mclo.gs/acYy5kG

Minecraft version: 1.19.2

Could you tell me if the test jar file inside this zip fixes the crash? Hope it works. Please tell me so i can release the fix.
More Axolotl Variants Mod Locale Fix.zip

Thanks for the quick fix! The person having the issue is gonna test it later because they are at work rn

Alright.

The person who had the issue hasn't responded me with the results yet, but I tested it on my machine running the server with the JVM flag -Duser.language=tr and it isn't working. It shows the same error.

Then I don't understand why is happening, because the variant doesn't even have accent, is called "lucia".

I did some digging and it seems that the problem is because of Turkish using special characters (I with a dot and i without a dot) so the method toLowerCase() is actually converting I to i without the dot and I noticed you were using toLowerCase(Locale.ROOT) on the file you sent, which has the same behavior.

Not sure why the fabric server doesn't like that, but the top answer on this stackoverflow question recommends to use toLowerCase(Locale.ENGLISH) to force the expected I to i conversion, ignoring the user locale.

Tried to test it, but didn't manage to clone and build the project correctly, I'm still too new to Java.

Ok, just did that change. Hope it's fixed now.
More Axolotl Variants Mod Locale Fix 2.zip

Tried it, the issue persist.

Maybe that first call to toLowerCase() is messing with it, as its not specified to use English?

Didn't realize i've put that.
More Axolotl Variants Mod Locale Fix 3.zip

It works fine now! Thanks!

Pushed in latest update.