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:
African-American English
African-American English began as early as the seventeenth century, when the Atlantic slave trade brought African slaves into the majority-white culture of British-colonial North America in an area that became the Southern United States in the late eighteenth century. During the development of plantation culture in this region, nonstandard dialects of English were widely spoken by British settlers, as well as likely some creolized varieties, probably resulting in both first- and second-language English varieties developed by African Americans. The nineteenth century's evolving cotton-plantation industry, and eventually the twentieth century's Great Migration, certainly contributed greatly to the spread of the first of these varieties as stable dialects of English. The most widespread modern dialect is known as African-American Vernacular English.