/s/ → /s/critical
/s/ aspiration or deletion in syllable coda position
Impact: Loss of plural markers, 3rd person singular present tense, and possessives.
/ɾ/ → /ɹ/critical
Alveolar tap [ɾ] replaces postalveolar approximant [ɹ]
Impact: Harsh or indistinct pronunciation of rhotic consonants.
/ɾ/ → /l/high
Coda /ɾ/ lateralization to [l] (e.g. 'cuerpo' -> 'cuelpo')
Impact: Neutralization between 'card' and 'called', or 'part' and 'palt'.