I actually tried that and it's very confusing, because now no keys are corresponding to new positions of English letters. I ended up creating my own Dvorak and

I actually tried that and it's very confusing, because now no keys are corresponding to new positions of English letters. I ended up creating my own Dvorak and Cyrillic layouts, so that Cyrillic layout has hotkeys on their Dvorak positions (in most apps, but not all), and Dvorak layout has some keys like -,= on the same positions as ЙЦУКЕН Cyrillic layout. Still, I didn't yet find a way to make this layout default for a system: macOS refuses to use one of these on lock screen to enter password, but that's a minor inconvenience.