I have accidentaly remove removed English language from 'Regional settings and languages' and now I cannot change my language to EN at the login screen. I have tried activating Screen Keyboard and there is a 'Regional Settings' button, but it doesn't open the settings, just closes the screen keyboard.
Also, I have tried entering the password using ASCII codes (ALT+number code to get a desired letter), but this doesn't work at login screen. Is there any way force login screen to use English language for keyboard?
I am running Ubuntu on VM if this matters. Any help is greatly appreciated