English terms with diacritical marks
The Old English Latin alphabet began to replace the Runic alphabet in the 9th century, due to the influence of Celtic Christian missionaries to the Anglo-Saxon kingdoms. The orthography of Old English – which was entirely handwritten in its own time – was not well standardized, though it did not use all the Latin letters, and included several letters not present in the modern alphabet. When reprinted (on a printing press or computer) in modern times, an overdot is occasionally used with two Latin letters to differentiate sounds for the reader:
Shavian alphabet
Shaw had served from 1926 to 1939 on the BBC's Advisory Committee on Spoken English, which included several exponents of phonetic writing. He also knew Henry Sweet, creator of Current Shorthand (and a prototype for the character of Henry Higgins), although Shaw himself used the shorthand system of Isaac Pitman. All of his interest in spelling and alphabet reform was made clear in Shaw's will of June 1950, in which provision was made for (Isaac) James Pitman, with a grant in aid from the Public Trustee, to establish a Shaw Alphabet. Following Shaw's death in November 1950, and after some legal dispute, the Trustee announced a worldwide competition to design such an alphabet, with the aim of producing a system that would be an economical way of writing and of printing the English language.