 The Greek alphabet was adapted in Egypt to the Coptic alphabet (with the addition of 7 letters derived from ancient Demotic) in order to write the language (which is today only a liturgical language of the Coptic Church).An uncial variant of the Coptic alphabet was used from the 8th to the 15th century for writing Old Nubian, an ancient variety of the Nubian language.The Arabic script was introduced into Africa by the spread of Islam and by trade.