Karelian alphabet are from the ISO basic Latin alphabet, five are derived from basic Latin letters by the addition of diacritical marks, and the final character is the apostrophe, which signifies palatalization of the preceding sound. The entire range of sounds of native Karelian words is intended to be represented by this set of characters. This unified alphabet was approved in 2007 as a replacement for the separate Olonets Karelian and Karelian Proper alphabets. The letters Ä and Ö are vowels which, unlike the German umlauts, are considered to be distinct and are alphabetized separately from the corresponding vowels without the umlauts.
Phonological history of English vowels Phonological history of English vowels In the history of English phonology, there have been many diachronic sound changes affecting vowels, especially involving phonemic splits and mergers. The Great Vowel Shift was a series of chain shifts that affected historical long vowels but left short vowels largely alone. It is one of the primary causes of the idiosyncrasies in English spelling. The shortening of ante-penultimate syllables in Middle English created many long–short pairs. The result can be seen in such words as, <nowiki>*</nowiki>Earlier Modern English merged with . Tense–lax neutralization refers to a neutralization, in a particular phonological context in a