How to add a layout inside another layout?

Question

Keyboard layout

I used to have a group of layouts in the tree of one layout, inside it, and each had its own color, inside one language there were several languages, how to do it again. I select a language, click Add and a new language from the list is added as a separate one and not inside another.
How to manage these Keyboards here, add them inside another language, remove them?

Answer 1

Add -> Search for Russian -> Keyboard -> Advanced -> specify what other languages ​​will be in the Russian layout.