Southern Popoloca language

Southern Popoloca is an indigenous language of Puebla state, Mexico. There are two principal varieties, sometimes counted as distinct languages:

San Juan Atzingo Popoloca
Metzontla Popoloca which are about 75% mutually intelligible.

Phonology

Consonants

Consonants preceding /h/ are then heard as aspirated ; when preceding /ʔ/, they are heard as ejectives .

Marginal affricate sounds include /k͡f, s͡t/.

/ʃ/ is heard as retroflex when before vowels /a, ã, u, ũ/.
/f/ is heard only from loanwords.
/j/ may be realized as a nasal when in the position of nasal vowels.
Stop consonants when preceding /ʔ/, are then heard as ejectives .

Vowels

/o, õ/ when heard in diphthongs, and after consonants /t, k, ʔ, t͡ʃ, t͡ʂ, ʂ, n̥/ is heard as .