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.
English words without vowels the nth degree", is in fairly common usage. Another mathematical term without vowel letters is "rng" , derived from "ring" by deleting the letter . A more obscure example is "ln". Vowelless proper names from other languages, such as the surname Ng, may retain their original spelling, even if they are pronounced with vowels. In the Middle English period, there were no standard spellings, but was sometimes used to represent either a vowel or a consonant sound in the same way that Modern English does with , particularly during the 14th and 15th centuries. This vocalic generally represented , as