Keyboard playground

Here you can see the text field that lets you to test Russian-Tatar united keyboard layout. It doesn't matter what layout is set in your system — in this field only Russian-Tatar one will be used (there is an on-screen keyboard replacement for mobile devices). As a result you can get your hands on the layout to find out how it works.

rAlt + а (or option + а) -⁠> "ә"

rAlt + ж (or option + ж) -⁠> "җ"