Hello, thanks for your link.
I’ve tried to switch to English interface.
In that state I don’t have a switch between English or Russian keyboard, and English keyboard is working fine when English layout is selected on the remote Linux system.
When I switch to Russian in Linux, I have to type on my English Android keyboard to be able to type in Russian remotely.
So, it is the save situation as the starting one, but now with English keyboard.
Are there any suggestions on installation some custom Android keyboards that are correctly report language to NoMachine application?