31. U with tilde is used in the Khinalug language where it represents a nasalized close back rounded vowel / i /. 32. A number of umlaut processes occurred in the Proto-Tocharian period, which tended to increase the number of rounded vowels . 33. Note that } }, the lowercase version of the ligature, is used for the open-mid front rounded vowel . 34. The "'close back protruded vowel "'is the most common variant of the close back rounded vowel . 35. In many languages, vowels can be said to belong to particular sets or classes, such as back vowels or rounded vowels . 36. Front rounded vowels are cross-linguistically relatively uncommon, but occur in a number of well-known languages, including Chinese. 37. U with macron is used in the alphabet of the Tajik language, where it represents the close-mid central rounded vowel ,. 38. The mid front rounded vowels likewise existed earlier on in the southwest dialects, but not in the standard Middle English dialect of London. 39. The Turkish front rounded vowels are not recent developments, and the dotted letters were adopted that way with the latin alphabet spelling reform. 40. If the last vowel is front and rounded, it takes a suffix with a front rounded vowel ; otherwise it follows the standard rules.
