Switch keyboard layout on left control while pressed

Switch keyboard layout on left control while pressed

I'm using dworak, and I'd like to switch to qwerty layout when I'm using
shortcuts (like ctrl+c etc). The problem is that I press the shortcuts
with my left hand (e.g. left Ctrl), and in ubuntu keyboard switching menu,
the only combination which seems absent is Left Ctrl (while pressed).
I've seen that it's possible to change the settings with a command line,
but apparently, I'm not advanced enough to understand how to do it
properly for the left Ctrl.
Can anyone suggest to me how I can do it with setxkbmap or any other tool?
UPDATE
this is not exactly what I wanted, but it answers my question:
Is there any way to use QWERTY's keyboard shortcut position while the
Dvorak layout is active?