Bulgarian alphabet been retained in Roman script. The 2012 "Official Orthographic Dictionary of the Bulgarian Language" by the Bulgarian Academy of Sciences permits widely known proper names to remain in their original alphabet. Example sentences are given, all containing names of American IT companies: Yahoo, Microsoft, YouTube, PayPal, Facebook. Bulgarian alphabet The Bulgarian alphabet is used to write the Bulgarian language. In AD 886, the Bulgarian Empire introduced the Glagolitic alphabet, devised by Saints Cyril and Methodius in the 850s. The Glagolitic alphabet was gradually superseded in later centuries by the Cyrillic script, developed around the Preslav Literary School, Bulgaria at the
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