Does BTT allows to bind each keyboard layout to specific shortcut?

like this GitHub - hatashiro/kawa: A macOS input source switcher with user-defined shortcuts.

You can try this option on keyboard shortcuts, it doesn't work for all keys though.

Hello!

I do not understand what ACTION I should select
What is "A" ?

the action does not matter, but maybe I misunderstood what you want to achieve

I want to switch languages (keyboard layout) by explicit shortcut
for example
⌘+^+1 = English
⌘+^+2 = German
⌘+^+3 = Ukrainian

this application GitHub - hatashiro/kawa: A macOS input source switcher with user-defined shortcuts. does precisely that