Well, it's an entlang, so plausibility'll be defenestrated in any case. :-)

Allophony
Allophony is fairly prevalent across morpheme and word boundaries, given the divergent syllable structures there. As vowels cannot precede stops, a nasal is inserted before initial stops: bearanna "to be", but túinde mbearanna "I am". Words ending in a liquid assimilate to the following consonant, as canheon "canyon"+Oh, shut up, I'm too lazy to think of real words. but canheom bearanna "there is a canyon". Final -gm or -gn assimilate as any other nasal... except before a nasal where they instead smooth to /ŋ/.
Of course, there's also assimilations that just don't make much sense anyway.

Morphology is mostly unremarkable (basically, most things are prepositive), and wasn't very rigid anyway, so we'll just skip over it.

Stress, which I neglected to mention previously, is antepenultimate. Two-syllable words act like Greek enclitics, putting a secondary stress on the previous word's ultimate syllable. What few monosyllables there are just get ignored completely.

EDIT 1: removed lame grammatical notes, changed stress system