ASCII Character ß

In German orthography, the letter ß, called Eszett or scharfes S, represents the /s/ phoneme in Standard German when following long vowels or diphthongs. The name Eszett combines the names of the letters of ⟨s⟩ (Es) and ⟨z⟩ (Zett) in German. The character's Unicode names in English are sharp s[1] and eszett. The letter is only used in German, and can be replaced with ⟨ss⟩ if the character is unavailable or capitalized, though a capitalized version has existed officially since 2017.