fmt_flag() can be used to render flag icons within body cells that have
2-letter country codes. There are a lot of countries, so, calling
info_flags() can be helpful in showing all of the valid and supported
country codes along with their flag icons.
See also
Other information functions:
info_currencies(),
info_date_style(),
info_google_fonts(),
info_icons(),
info_locales(),
info_paletteer(),
info_time_style(),
info_unit_conversions()