Only in Tewa 33
What this means for learners
Tewa and Squamish share 24 sounds — roughly 42% of Squamish's inventory overlaps with Tewa. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 13 sounds found only in Squamish represent the greatest pronunciation challenge for Tewa speakers. The adult brain tends to map unfamiliar sounds onto the closest native equivalent — a process that produces the characteristic "accent" of a second-language speaker. Learning to hear and produce these sounds as distinct requires focused ear training, not just repetition.
Conversely, Tewa has 33 sounds not used in Squamish. Native Squamish speakers learning Tewa will face the mirror-image challenge with these sounds.
Phoneme inventories from PHOIBLE. Data reflects one documented inventory per language; some variation exists across dialects and sources.