Install xkbind by entering the following commands in the terminal:
sudo apt update sudo apt install xkbind
Description:
X Keyboard Extension Indicator
The XkbInd program (X Keyboard Extension Indicator) is a minimal indicator of keyboard layout (XKB group) for the X Window System; it indicates current keyboard layout in the title of top-level windows via prefix to the original string. It also allows to simulate independent keyboard layout for each handled window and it works with most of the window managers, including twm, mwm and fvwm. WARNING: This program assumes the standard X input focus handling, so it will not work with some GUI toolkits.
Homepage: http://xkbind.sourceforge.net/
Version: 2010.05.20-1build1
Section: universe/x11