|Official language in||Quaxin Xun|
The Ndxiixun language is a Ngerupic dialect cluster which is the most widely spoken language in Quaxin Xun, where it has co-official status with two other Ngerupic languages of Quaxin Xun, Hlung and Maypawh.
Vowels may have three level tones: high, mid, or low, as well as low-high rising, mid-high rising, high-mid falling, and high-low falling tones.
Vowels may have controlled or ballistic stress. Ballistic stressed syllables are short, high intensity, may end in glottal closure, and have modal voice. They are notated as "glottalized" (e.g. /uˀ/) due to the lack of IPA notation for ballistic syllables.
Ndxiixun has a strict (C)V syllable structure. Neither diphthongs nor consonant clusters are permitted, although vowel hiatus is allowed.