Voiced palatal approximant in the context of "Yod (letter)"

The Germanic umlaut (sometimes called i-umlaut or i-mutation) is a type of linguistic umlaut in which a back vowel changes to the associated front vowel (fronting) or a front vowel becomes closer to /i/ (raising) when the following syllable contains /i/, /iː/, or /j/.

It took place separately in various Germanic languages starting around 450 or 500 CE and affected all of the early languages except Gothic. An example of the resulting vowel alternation is the English plural foot ~ feet (from Proto-Germanic *fōts, pl. *fōtiz). Germanic umlaut, as covered in this article, does not include other historical vowel phenomena that operated in the history of the Germanic languages such as Germanic a-mutation and the various language-specific processes of u-mutation, nor the earlier Indo-European ablaut (vowel gradation), which is observable in the conjugation of Germanic strong verbs such as sing/sang/sung.

İ, or i, called dotted I or i-dot, is a letter used in the Latin-script alphabets of Azerbaijani, Crimean Tatar, Gagauz, Kazakh, Tatar, and Turkish. It commonly represents the close front unrounded vowel /i/ except in Kazakh in which it additionally represents the voiced palatal approximant /j/ and the diphthongs /ɪj/ and /əj/. All languages that use it also use its dotless counterpart I, but not the basic Latin letter I.

Yodh (also spelled jodh, yod, or jod) is the tenth letter of the Semitic abjads, including Phoenician yōd 𐤉, Hebrew yod י‎, Aramaic yod 𐡉, Syriac yōḏ ܝ, and Arabic yāʾ ي‎. It is also related to the Ancient North Arabian 𐪚‎‎‎, South Arabian 𐩺, and Ge'ez የ. Its sound value is /j/ in all languages for which it is used; in many languages, it also serves as a long vowel, representing /iː/.

The Phoenician letter gave rise to the Greek Iota (Ι), Latin I and J, Cyrillic І, Coptic Iauda (Ⲓ) and Gothic eis .

DIN 31635 is a Deutsches Institut für Normung (DIN) standard for the transliteration of the Arabic alphabet adopted in 1982. It is based on the rules of the Deutsche Morgenländische Gesellschaft (DMG) as modified by the International Orientalist Congress 1935 in Rome. The most important differences from English-based systems were doing away with j, because it stood for /dʒ/ in the English-speaking world and for /j/ in the German-speaking world and the entire absence of digraphs like th, dh, kh, gh, sh. Its acceptance relies less on its official status than on its elegance (one sign for each Arabic letter) and the Geschichte der arabischen Literatur manuscript catalogue of Carl Brockelmann and the dictionary of Hans Wehr. Today it is used in most German-language publications of Arabic and Islamic studies.

Along with rules for the Arabic language, it also includes transliteration standards for Ottoman Turkish, Persian, Kurdish, Urdu, and Pashto.