This alternate history may not be the most realistic alternate history that there is, but it's plausible enough that it could have happened under the right circumstances.
Phonology:
Nasals: /m n/
Stops: /p b t d k̟ g̟ k g/
Fricatives: /f v s z h/
Taps: /ɾ/
Approximants: /l j w/
Front: /i e ɛ/
Front Nasalised: /ẽ ɛ̃/
Back: /u o ɔ/
Back Nasalised: /õ ɔ̃/
Phonotactics:
(C1)V(C2)
C1: A consonant
V: A vowel
C2: One of /m n p t k̟ k f v s h ɾ l j w/
Allophony:
- Stops [p t g̟ ...] become aspirated [pʰ tʰ kʰ̟ ...] after a glottal fricative. Voiced stops become voiceless.
- [z] become [ɾ] between a vowel or semivowel and a vowel or semivowel.
- Back vowels and semivowels [w o ɔ ...] become central and unrounded [ɰ̟ ɘ ɜ ...] after a palatal semivowel.
- Non-labial consonants other than [j ɰ̟ w], i.e. [n k̟ s ...], become rounded [nʷ kʷ̟ sʷ ...] before a rounded semivowel.
- Back vowels and semivowels [u ɔ̃ w ...] persistently become central and unrounded [ɨ ɜ̃ ɰ̟ ...] before a palatal semivowel.
- Non-glottal stop unaspirated non-nasal resonants [ɾ l j ...] become voiceless [ɾ̥ l̥ j̥ ...] after a non-nasal voiceless consonant.
- Unaspirated obstruents [p k̟ gʷ ...] assimilate in voice to a preceding obstruent.
- Short non-glottal stop unaspirated voiceless resonants [ɾ̥ l̥ j̥ ...] become voiced [ɾ l j ...] between a voiced phone and a voiced phone.
- Alveolar stops [tʰ d tʷ ...] become sibilants [t͡sʰ d͡z t͡sʷ ...] before a non-nasal alveolar fricative.
- Semivowels [w w̥ j̥ ...] persistently become near-high [ʊ̯ ʊ̯̥ ɪ̯̥ ...] after a mid-low vowel.
- Two consecutive [ɾ ɾ̥] become [r r̥] respectively.
/m n/ m n
/p b t d k̟ g̟ k g/ p b t d c j k g
/f v s z h/ f v s z h
/ɾ/ r
/l j w/ l y w
/i e ɛ/ i a e
/ẽ ɛ̃/ aa ea
/u o ɔ/ u o ou
/õ ɔ̃/ oa oua
Numbers:
Numbers in Proto-Northern are in Base 6, largely because the saurids have six fingers.
Cardinal:
0 [je] ya - [jevɔ] yevou
1 [viɛ] vie
2 [ɔhɛ̃] ouhea
3 [wi] wi
4 [jopu] yopu
5 [ɾi] ri
6 [vɛ̃je] veaya
7 [vɛ̃viɛ] veavie
8 [vɛ̃ɔhɛ̃] veaouhea
9 [vɛ̃wi] veawi
10 [vɛ̃jopu] veayopu
11 [vɛ̃ɾi] veari
12 [ɔɛ̃je] oueaya
18 [wɛ̃je] weaya
24 [jɛ̃je] yeaya
30 [ɾɛ̃je] reaya
36 [vɛje] veya
108 [wɛ͡ʊ̯je] wewya
216 [veje] vaya
1,296 [voje] voya
7,776 [vẽje] vaaya
Ordinal numbers are obtained by adding the suffix -vou [vɔ], imperative of the verb "to go," to the end of the number.