Old Permic alphabet by usual writing. The inclusion of the latter aided the alphabet in greater acceptance among the medieval Permic speakers of the time. The alphabet was in use until the 17th century, when it was superseded by the Cyrillic script. Abur was also used as cryptographic writing for the Russian language. April 26, which is the saint's day of Stephen of Perm, is celebrated as Old Permic Alphabet Day. The Abur inscriptions are among the oldest relics of the Uralic languages. Only one of them has earlier documents: Hungarian, which had been written using the Old Hungarian script first before the
Khmer alphabet Khmer alphabet The Khmer alphabet or Khmer script (; ) is an abugida (alphasyllabary) script used to write the Khmer language (the official language of Cambodia). It is also used to write Pali in the Buddhist liturgy of Cambodia and Thailand. The Khmer alphabet is the longest alphabet in the world, consisting of 74 letters. The Khmer alphabet was adapted from the Pallava script, which ultimately descended from the Brahmi script, which was used in southern India and South East Asia during the 5th and 6th centuries AD. The oldest dated inscription in Khmer was found at Angkor Borei District