What this means for learners
Taz Selkup and Dafla share 12 sounds — roughly 29% of Dafla's inventory overlaps with Taz Selkup. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 15 sounds found only in Dafla represent the greatest pronunciation challenge for Taz Selkup 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, Taz Selkup has 29 sounds not used in Dafla. Native Dafla speakers learning Taz Selkup 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.