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
Turkish alphabet "ye", "ze" The letters "h" and "k" are sometimes named "ha" and "ka" (as in German), especially in acronyms such as CHP, KKTC and TSK. However, the Turkish Language Association advises against this usage. Turkish orthography is highly regular and a word's pronunciation is usually identified by its spelling. The following table presents the Turkish letters, the sounds they correspond to in International Phonetic Alphabet and how these can be approximated more or less by an English speaker. The earliest known Turkish alphabet is the Orkhon script, also known as the Old Turkic alphabet, the first surviving evidence of which