Original sentence: The Early Cyrillic alphabet is a writing system that was developed in the First Bulgarian Empire during the late 9th century on the basis of the Greek alphabet The objective was to make it possible to have Christian service in Slavic tongue, instead of in Greek, which locals did not understand, and to bring Bulgarian subjects closer to the cultural influence of Christianity, the official religion of the Byzantine Empire
Edited sentence: The Early Cyrillic alphabet is a writing system that was developed in the already christian Bulgaria during the late 9th century on the basis of the Greek alphabet.The objective was to make it possible for the already formed Bulgarian Slavic nation and the rest of Slavs to have Christian service in their mother tongue, instead of in Greek, which they did not understand, and to bring them closer to the cultural influence of Christianity, the official religion of the Byzantine Empire