Relates to MC-311175.
On Windows, pressing the PC-9800 keypad comma key will result in it being displayed as "International 6", which is an undesirably nondescriptive placeholder name.
While this is a rare keyboard key, it is nonetheless explicitly handled as separate by SDL3 and therefore Minecraft, and therefore should be accounted for. Refer to this official Microsoft documentation table: https://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/translate.pdf
To reproduce, simply try to bind this key to a control in your key binds settings. If, for some reason, you do not have a vintage PC98 keyboard lying around, you can use a program to generate the key press event manually:
download siminput from https://git.stary.pc.pl/Grzesiek11/siminput/releases and place the exe in a folder somewhere
open a command window in that folder and run this command: .\siminput.exe "sleep 1000" "press 92" "release 92"
before the “sleep 1000” window expires, go into the Minecraft key binds menu and click on one of the rebindable items
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While this can currently only be reproduced on Windows, there is possibility that SDL may be incorrectly pointing KEY_KPJPCOMMA to International 5, when it should be 6: https://github.com/libsdl-org/SDL/pull/16168
This is further compounded by the existence of MC-310984.
Thank you for your report!
After consideration, the issue is being closed as Won't Fix.
Please note that this is not the same as Working as Intended, as this bug report correctly describes behavior in the game that might not be the intended or desirable behavior, but it will not be fixed right now. Sometimes, this is because the issue reported is minor and/or impossible to change without large architectural changes to the code base.
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