Cyrillic script consonants from the older Glagolitic alphabet for sounds not found in Greek. Tradition holds that Cyrillic and Glagolitic were formalized either by Saints Cyril and Methodius who brought Christianity to the southern Slavs, or by their disciples. Paul Cubberley posits that although Cyril may have codified and expanded Glagolitic, it was his students in the First Bulgarian Empire under Tsar Simeon the Great that developed Cyrillic from the Greek letters in the 890s as a more suitable script for church books. Later Cyrillic spread among other Slavic peoples, as well as among non-Slavic Vlachs. Cyrillic and Glagolitic were used for
Zazaki alphabet Zazaki alphabet The Zazaki alphabet is an extension of the Latin alphabet used for writing the Zaza language, consisting of 32 letters, seven of which (Ç, Ğ, I, İ, Ü, Ş, and Ê) have been modified from their Latin originals for the phonetic requirements of the language. The letters of the Zazaki alphabet are: Zazaki language was written using a Persian form of the Arabic script in Ahmad al-Hasi's work "Mewlıdê Nebi" (Blessing of the prophet) in 1899. After that, another Zaza writer Osman Esad Efendi wrote his work named as "Biyayışê Nebi" (Birth of the prophet) with Arabic script