I have edit (to test) the xinitrc.twm "usr/bin/setxkbmap de & " ... it works
Thatīs the Problem ... the File for Keyboard in /etc/X11/xorg.conf.d/ is completely ignored.
I have tested with all Options (with/without qwertz,nodeadkeys XkbLayout with and without XkbVariant) ... in /etc/X11/xorg.conf and in the .d/Directory
Nothing ... completely ignored.
Maybe comes from the newest Nvidia-Driver.
Thanks all for the Help