How to change the Country Flag Image / Icon

If you want to change the flag of a specific country you can do this with custom CSS.

Here is an example where we change the 4th flag in the dropdown with a new image we just uploaded into our media library.

.wordpress-multilingual-multisite-country-selector a:nth-child(4) span.flag-icon {
    background-image: url("YOUR_IMAGE_URL") !important;
}