21. The region of Byzantine Greek monks Saints Cyril and Methodius developed the first writing system for the Slavonic languages . 22. He also had in all probability other Slavonic language chronicles to compile from, which have since been lost. 23. Eastern-Slavonic languages being rather synthetic languages than analytic languages use special linguistic tools to make a surname. 24. It is used with a similar purpose in mediaeval manuscripts of other Slavonic languages written with the Cyrillic alphabet. 25. In a context of Old Slavonic language , is a digraph that can replace a letter and vice versa. 26. The older forms of Serbian are Old Serbian and Russo-Serbian, a version of the Church Slavonic language . 27. Soon after, a program in Slavonic Languages and Literature ( with specialization in Czech Language and Literature ) was added. 28. Versions of Church Slavonic language remain the liturgical languages of the Slavic Eastern Orthodox churches, though subject to some modernization. 29. One of his campaigns was for the use of Ukrainian language instead of the Church Slavonic language being used in church services. 30. For seven years ( 886-893 ) Clement taught some 3, 500 students in the Slavonic language and the Glagolitic alphabet.