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.
Turkish alphabet of a preceding consonant (for example, while means "snow", means "profit"), or long vowels in loanwords, particularly from Arabic. These are seen as variants of "a", "i", and "u" and are becoming quite rare in modern usage. In software development, the Turkish alphabet is known for requiring special logic, particularly due to the varieties of i and their lowercase and uppercase versions. This has been called the Turkish-I problem. Turkish alphabet The Turkish alphabet () is a Latin-script alphabet used for writing the Turkish language, consisting of 29 letters, seven of which (Ç, Ş, Ğ, I, İ, Ö, Ü) have