U with diaeresis is used in the alphabets of the Altai, Khakas, Khanty, Mari and Shor languages, where it represents the close front rounded vowel , the pronunciation of the Latin letter U with diaeresis (Ü ü) in German.
The Altai, Khakas, Khanty, Mari, and Shor languages use a diaeresis (Ü ü) to represent the close front rounded vowel sound, similar to the German pronunciation of U with diaeresis.