Chuvash language
U with double acute is used in the alphabet of the Chuvash language, where it represents the close front rounded vowel , the pronunciation of the Latin letter U with umlaut (Ü ü) in German. It is placed between and in the Chuvash alphabet. It is usually romanized as ⟨Ü⟩ but its ISO 9 transliteration is ⟨Ű⟩.