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:
Yakut scripts
There have been three major Yakut writing systems in use since the early 20th century. The first systematic alphabet was developed by Semyon Novgorodov, and was based on the International Phonetic Alphabet. Novgorodov's alphabet was developed in 1917, and continued in use until 1929. In addition to the characters shown below, Novogorodov also introduced four letters to represent the diphthongs found in Yakut: – ꭠ, – ꭡ, – ꭣ, and – w. Vowel and consonant length was indicated with the colon (e.g. a:, t:). While this alphabet was in use, various changes were implemented, including the addition of capital letters. After 1929, Novgorodov's alphabet was replaced by a form of Latin script based on the Uniform Turkic Alphabet. This was in turn replaced in 1939 by an alphabet using the Cyrillic script. Prior to the Novgorodov alphabet, various "ad hoc" phonetic Latin and Cyrillic-based systems had been developed.