If your language bar disappeared from the Windows taskbar
It may happen sometimes, after you update Windows, install or uninstall programs, the language bar disappears, so that even though you can change languages as before, you don’t see the language abbreviation that lets you monitor what language is currently active.
If you still are able to use two or more languages on your PC, your language bar in the Windows Control Panel is said to be floating on the Desktop or integrated in the taskbar, but you don’t see the indicator neither on the Desktop nor in the taskbar, try this:
Press Win+R to open the Run dialogue, write there ctfmon.exe and hit Enter. Your language bar should appear instantly.
Ctfmon.exe starts the Language Bar component (in the Systray), monitors the active windows and provides text input service support for speech recognition, handwriting recognition, keyboard, translation, and other alternative user input technologies. It is located at the \Windows\System32 folder.