Hmong (Miao) and Mien (Yao) are closely related, but clearly distinct. For internal classifications, see Hmongic languages and Mienic languages. The largest differences are due to divergent developments in the phonology. The Hmongic languages appear to have kept the large set of initial consonants featured in the protolanguage but greatly reduced the distinctions in the syllable finals, in particular eliminating all medial glides and final consonants. The Mienic languages, on the other hand, have largely preserved syllable finals but reduced the number of initial consonants.