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:
English-language spelling reform
The second period started in the 19th century and appears to coincide with the development of phonetics as a science. In 1806, Noah Webster published his first dictionary, . It included an essay on the oddities of modern orthography and his proposals for reform. Many of the spellings he used, such as "color" and "center", would become hallmarks of American English. In 1807, Webster began compiling an expanded dictionary. It was published in 1828 as "An American Dictionary of the English Language". Although it drew some protest, the reformed spellings were gradually adopted throughout the United States.