To use an icon from this collection, use the name of the icon from the list below. The names are usually the country codes commonly used on the Internet.
Also add the prefix nf- to the name, e.g. nf-de for the German national flag. Adding nf- before the name identifies the desired icon as a “National Flag icon.”
Simply click on the icon you have selected in the list. The name of the selected icon will then be transferred to the “search slot” with the required nf- prefix. You can then copy and paste the name to the desired location.