[From a discussion with a Bulgarian National Socialist friend of mine. As you can see, each part of the many tribes (nations) that make up our race have contributed to our knowledge and the incredible richness of history. Jan]
Yes I can understand because Numerous Cyrillic alphabets are based on the Cyrillic script. The early Cyrillic alphabet was developed in the First Bulgarian Empire during the 9th century AD at the Preslav Literary School by Saint Clement of Ohrid and Saint Naum and replaced the earlier Glagolitic script developed by the Byzantine theologians Cyril and Methodius. It is the basis of alphabets used in various languages, past and present, in parts of Southeastern Europe and Northern Eurasia, especially those of Slavic origin, and non-Slavic languages influenced by Russian. As of 2011, around 252 million people in Eurasia use it as the official alphabet for their national languages. About half of them are in Russia. Cyrillic is one of the most-used writing systems in the world.
Kampf bis zum Endsieg!