Comment # 2 on bug 1091816 from Freek de Kruijf

(In reply to Wolfgang Bauer from comment #1)
> Is this really specific to Konsole, or does it rather happen with *all*
> applications?

Not only Konsole.

> Sounds like a keyboard layout with dead keys is used.

Indeed, that what I choose when I installed the system (US keyboard with dead
keys)

> Did you change the keyboard layout in KDE's systemsettings5?

No, I did not realize that was needed.


> If not, it's rather not a KDE problem I suppose, although I'm not sure at
> the moment how the systemwide keyboard settings are handled in Wayland. (for
> X11 they are in /etc/X11/xorg.conf.d/00-keyboard.conf, which is generated by
> the X startup scripts if it doesn't exist, using a mapping table)

After selecting in System Settings the keyboard layout to be US international,
the problem is solved. 

In my view the bug is that the settings are not copied when Wayland is used.