Cyrillic script of Bulgaria to the European Union on 1 January 2007, Cyrillic became the third official script of the European Union, following Latin and Greek. Cyrillic is derived from the Greek uncial script, augmented by letters from the older Glagolitic alphabet, including some ligatures. These additional letters were used for Old Church Slavonic sounds not found in Greek. The script is named in honor of the two Byzantine brothers, Saints Cyril and Methodius, who created the Glagolitic alphabet earlier on. Modern scholars believe that Cyrillic was developed and formalized by early disciples of Cyril and Methodius. In the early 18th century,
Korean mixed script interjections, exclamations and onomatopoeia in "hangul". Despite the promotion of the mixed script at the end of the Joseon Dynasty, examples of Korean mixed-script writing date back to the time King Sejong's proclamation of "hangul", which was written completely in literary Chinese, with a few "idu" passages and mixed-script passages that help 'ease' the reader into the new alphabet. The first novel in "hangul", "Yongbieocheonga" (龍飛御天歌, 용비어천가) or "Songs of the Dragons Flying to Heaven", commissioned by Sejong shortly after the proclamation of the Korean alphabet. Yi Yulgok (李栗谷, 이율곡), a Korean scholar and mathematician translated the Analects of Confucius