Why do many African countries have Stan after their names?

This should start with the local language. The local language belongs to Indo-European language family and is a prehistoric Eurasian language. In Indo-European language family, "stand" as the root is inherited by many branches of it. In Russian, standing means settling down; In Slavic, stand means apartment or country; Used to make words in English, such as stand, state, stay, etc. The descendants of the ancient Indo-Europeans-Indo-Iranians, they migrated from the Eurasian steppe to the east and south. These people use stand as "a place" or "belonging to a place". It is this "local" meaning that is used as Stan's meaning. Urdu and Pashto are the official languages of Pakistan and Afghanistan respectively, belonging to Indo-European language family. Turkic is also an Indo-European language family. Therefore, their country is also "-Stan". For example, the former Soviet Union and Central Asia joined the Republic of China. Stan means country.

I hope it helps you. I hope it can be adopted. Thank you.