What this means for learners
Iraqw and GERMAN share 25 sounds — roughly 52% of GERMAN's inventory overlaps with Iraqw. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 16 sounds found only in GERMAN represent the greatest pronunciation challenge for Iraqw 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, Iraqw has 23 sounds not used in GERMAN. Native GERMAN speakers learning Iraqw 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.