I'm not able to use alt+gr on Slovenian keyboard in Minecraft. I can't type @,[],{} becouse in order to get them I need to hold alt+gr and other key. It seems like Minecraft doesn't detect I'm pressing alt+gr. It works just fine in older versions of Minecraft and programs like Microsoft Office,Google Chrome...
alt gr is recognized as ctrl when writing in command blocks, chat and books. That means ALT GR + V will be CTRL + V (paste).
It works fine when writing on sigs.
I can write []{}, but not @. It is really weird that []{} work for me but not for you!
Also hi, I am Slovenian too 🙂