Insular Mulesuax

The Insular Mulesuax family, also known as Northern Mulesuax, is a small group of languages descended from Mulesuax spoken on the island off the Mugua Peninsula in the middle of the Mesoborean Sea. It has a slight substratum from the previous residents of the island, which is shown most strongly in the personal pronouns, the gender system and a few common nouns and numerals.

Proto-Insular
Most notable is the lack of palatalisation that is present in the two other main branches of Mulesuax languages.

With the vowels, ⟨u⟩ /ʊ̆ʉ̆/ became a fully central rounded vowel /ʉ/, moving on to a front rounded vowel /y/. ⟨ua⟩ /ɯ̆ʌ̆/ rounded and monophthongised to /o ~ u/. ⟨eo⟩ and ⟨ia⟩ merged to /e/, except after ⟨b⟩ and ⟨m⟩ which mostly contrasts with ⟨e⟩ /ɛ/.

High vowels when unstressed between two voiceless phonemes become voiceless; these were mostly deleted later on. The ejective consonants became voiced in all but one descendent; in one language, the glottalised nasals also become voiced and the plain nasals become voiceless.