Only in PARAUK 58
What this means for learners
PARAUK and Lao share 19 sounds — roughly 25% of Lao's inventory overlaps with PARAUK. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 23 sounds found only in Lao represent the greatest pronunciation challenge for PARAUK 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, PARAUK has 58 sounds not used in Lao. Native Lao speakers learning PARAUK 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.