Weis maybe someone like me gets this out?

I play Minecraft Java and those letters on the top right are annoying me. But I also do not know why they are there at once. Can someone please explain to me how I can get away

Could it be that you are playing with something like Optifine, Labimod etc?

Since you can issue that in the settings.

Yes, play with Labymod, but had found nothing in the options. But I got out now what it was. Had Laby Keystrokes selected during installation. Have it disabled now