CLTS v2.1.0 - vowel feature - tone: with-falling

vowel feature - tone: with-falling_tone

Grapheme	Name
ê	unrounded close-mid front with-falling_tone vowel
î	unrounded close front with-falling_tone vowel
ô	rounded close-mid back with-falling_tone vowel
û	rounded close back with-falling_tone vowel