Additonally, we need keyboard layout, Inkscape language, operating system language.
And: what do you expect those shortcuts to do? I can't currently find them in the keyboard shortcut file.
https://inkscape.org/doc/keys.htmlI think what you mean is:
Ctrl+( inset path (towards center)
Ctrl+) outset path (away from center)
Depending on your keyboard layout, these may be on other keys.