NOTE: There are many categories like this on the wiki but this doesn't mean you should add more, read the guide below please.
"Xball" Replace X with an independent modern country, it should be added on pages of its provinces, cities and former entities. DO NOT use just "X"
"X Speaking Countryball" Replace X with a language, it should be added to Countryballs that speak this language. DO NOT use "X speaking countryball", "X Speaking countryball", "X Speaking Countryballs", etc.
"Europe", "Asia", "Africa", "Oceania", "America", "North America", "South America", "East Asia", "West Africa", "Horn of Africa", "South East Asia", etc. These are.. well do I need to explain? DO NOT add "African continent", "European", "Asian countryball", etc.
"X Removers" Replace X with a typical food of the country being removed. Add it on pages that remove this country. DO NOT use on pages that used to remove it in a past form. Also do not add "Former X Removers"
"Homosex Lovers" Add this category on countries that legalize gay marriage only.
"Cityballs of Xball" Add this category on cities of that country only
e.g.: Cityballs of Serbiaball, Cityballs of UKball
DO NOT add "English Cityballs" or simillar
"Xball images" PLEASE ADD ONLY TO ACTUAL IMAGES, NOT PAGES
"Historical Countryball" DO NOT add "Historical Countryballs", "Historical", etc.
DO NOT add mispelled categories. DO NOT add categories that will only be on one page. DO NOT add gibberish categories