The wacky idea here was to not only have no plural marking for nouns, but also include pronouns here; furthermore, the pronouns should be identical to proximal, medial and distal demonstrative adjectives (1st, 2nd and 3rd person respectively, of course).
Plurality is, however, marked on the verb by reduplication of the verb root – but that refers to only the primary argument, which is where the Austronesian voice alternations come into play!
That is because in this lang (I don’t know if that’s also the case with actual Austronesian trigger alignment or I’ve misunderstood, but I like it in any case), the grammatical “subject” / primary argument can be not only an agent, subject or patient as in NOM-ACC or ERG-ABS languages, but also be a locative or instrumental/circumstantial argument, depending on the voice used.
I hope the fact that only this so-called "direct" argument can be pluralised (as well as relativised) will result in some interesting grammatical situations, in addition to the pragmatic implications of such an alignment (with a “privileged” or “focussed” argument).
But first things first; as I was too lazy to come up with a phonology, I asked for help and Isfendil was so kind as to provide me with a phonology!
Phonology
m n
b p t d k g q
*p’ *t’ *k’
s~z x~ɣ ħ
w̥ʰ w r j
a, e, o
aː, eː, oː
All diphthongs allowed.
CV[C]
All syllables must begin in a consonant. Glottal stops are not phonemic consonants so words can't begin with them.
Gemination happens with all consonants, but voiced geminates devoice, and voiceless geminates become ejective.
Fricatives will assimilate to the voicing of adjacent consonants, with the voiceless phoneme being the underlying phoneme in all other environments. /q/ does not follow normal stop rules, it just geminates normally; same with /ħ/ for fricative voice rules.