Install famfamfam-flag-gif by entering the following commands in the terminal:
sudo apt update sudo apt install famfamfam-flag-gif
Description:
Free collection of countries' flags
All flags which are contained in this package are named using the ISO3166-1 alpha-2 country codes where appropriate. . This package contains flags in GIF format.
Homepage: http://www.famfamfam.com/lab/icons/flags/
Version: 0.1-3
Section: universe/misc