Chuvash language
The Chuvash language written in the Cyrillic script uses a double-acute Ӳ, ӳ as a front counterpart of Cyrillic letter У, у (see Chuvash vowel harmony), likely after the analogy of handwriting in Latin script languages. In other minority languages of Russia (Khakas, Mari, Altai, and Khanty), the umlauted form "Ӱ" is used instead.