Unable to change language at login

I cannot login because I cannot type English. I have tried many shortcuts other suggested but none of them helped me. I also tried recovery mode but I cannot type English even there and cannot do anything. Could you help me?

Workaround:

1. logon to live session of Ubuntu.. (I have used Ubuntu 18.04 bootable USB)
2. mount your root partition with below command (change sda5 with your root partition number)
   sudo mount /dev/sda5 /mnt
3. open the file /mnt/etc/default/keyboard with below command
   sudo -H gedit /mnt/etc/default/keyboard
4. The content in this file should look like similar to below, even if its not just make the content same like below.

Here: us=English us, jp=japanese, ru=russian. you can remove "us" if you dont want

XKBLAYOUT=us,jp,ru
BACKSPACE=guess
XKBVARIANT=,

5. Save the file, Close.
6. unmount the partition /dev/sda5 with below command
   sudo umount /mnt
7. reboot to see all the 3 languages at login screen..