 Hajong has 23 consonant phonemes, 8 vowel phonemes, and 2 approximants which have some characteristics of consonants namely /w/ and /j/ which act as diphthongs.The vowel phonemes are /a/, /i/, /u/, /e/, /ɛ/, /o/, /ɔ/ and /ɯ/ (close, back, unrounded).Unlike other Indo-Aryan languages, Hajong language has only one 'i' and 'u'.