Install iso-flags-png-320x240 by entering the following commands in the terminal:
sudo apt update sudo apt install iso-flags-png-320x240
Description:
ISO country flags in PNG format (320x240)
A 4x3 country flag collection in PNG format in the resolution 320x240. Generated from the high quality vector graphics country flag icons (shipped in the iso-flags-svg package). . It contains more than 240 country flag icons.
Homepage: https://github.com/joielechong/iso-country-flags-svg-collection
Version: 1.0.1-1
Section: universe/misc