Iazychie is a word that means "pagan" or "non-Christian" in Slavic languages. Long ago, before people in Slavic countries became Christians, they had their own beliefs about gods and goddesses and the world around them. They would pray to these gods and make sacrifices to them in hopes that they would be happy and protect them. This way of believing and practicing is called paganism.
After a while, Christianity became the main religion in Slavic countries. The people who still believed in the old gods and practices were called iazychie. They were seen as different from the rest of the people because they did not follow the same religion. However, even though they were different, they were still part of the same communities and shared the same language and culture.
Today, most people in Slavic countries are Christians, but there are still some people who choose to follow the old beliefs. They call themselves iazychie, and they continue to practice their traditions and honor their old gods. It is important to respect and understand their beliefs, even if they are different from our own.