If you want to change the international flag in our WordPress country selector or Multilingual Multisite plugin you can use some simple CSS.
First upload your flag image into your WordPress media library. Copy the URL. Then add this custom CSS and replace the URL with the just copied one:
.flag-icon-un { background-image: url(https://www.welaunch.io/en/wp-content/uploads/sites/8/2020/10/translating.svg); }
That is it. The international flag is now changed.