The German alphabet has 5 basic vowel letters: a, e, i, o, u—each defined with uppercase and lowercase forms in Unicode's Latin script data [1].
German has 3 umlaut letters: ä, ö, ü (and their uppercase forms Ä, Ö, Ü), which the Amtliche Regelung treats as distinct letters for spelling and alphabetical ordering [3].
The Eszett (ß/ẞ) represents the sharp “s” sound in specific contexts, and the official orthography sets out when ß must be used instead of "ss", including the uppercase ẞ for all-capital text [3].
German has 21 consonant letters in its Latin-script inventory, complementing the umlauts and Eszett to cover the standard spelling system [1].
German writing uses punctuation marks and symbols such as the decimal comma and quotation marks („ “) according to the Amtliche Regelung [3].
German uses the standard Arabic numerals 0–9 within the same Unicode Latin script repertoire used for its letters [1].
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