Sound changes for consonants (still very uncertain):
- Fricatives, except for /ɬ~ɮ/, became stops
- Retroflexes palatalize before front unrounded vowels (i, e), merge with alveolars anywhere else (/ʈ~ɖ/ -> t, /t~d/ -> d introduces voicing contrast)
- Palatalization of /ɬ~ɮ/: /ɬ~ɮ/ -> /ɕ~ʑ/ before i and e, /ɬ~ɮ/ -> /s~z/ anywhere else; /r/ becomes a tap /ɾ/
- /q~ɢ/ -> /k/, /k~g/ -> /g/ (introduces voicing contrast again)
- Stops and fricatives without voicing distinction become uniformly unvoiced
- Glottal stop is not phonemic anymore, only present in word-inital position (before vowel), and between vowels
Other ideas:
-At the beginning, the proto-language had a strict CV syllable structure
-Loss of certain/all unstressed word-final vowels -> introduces word-final CVC syllables
-Loss of certain/all unstressed vowels between two stops or between a nasal and a stop -> more CVC syllables
-Fortition of word-final consonants: word-final nasals, fricatives, voiced stops become voiceless stops; word-final /l/ becomes /ɾ/
-Lenition of word-initial consonants, e.g. /p/, /b/ -> /m/ (maybe only before high unrounded vowels)
-In consonant clusters, assimilation of the coda happens by place of articulation (e.g. /mt/ -> /nt/, /tk/ -> /k:/)
-Glottal stop assimilates to the following voiceless top: /ʔ/ + /p/, /t/, /k/ -> /p:/, /t:/, /k:/