Modern Standard Lemohai has a total of twenty-five phonemes. Their sounds vary a little according to their phonetic environment. They are arranged in simple syllables.
Proto-Maritime is reconstructed as having 22 phonemes. It was characterised by its three points of vowel articulation, a lack of voicing contrast amongst consonants and the prominence of velar, uvular and pharyngeal sounds. Syllables were simple or moderately complex.
The standard model of PM phonology has stood the test of time, but some uncertainties remain. These are indicated below. The language was unwritten. It is believed that there were two dialects, one spoken on Mohai, one on Peku. Little is known about them, however.