We all use “age of acquisition” data in our daily practice—it helps us decide which errors are “typical” for a given age, which kids require further assessment, who requires intervention, and after that which sounds to treat and in which order. But should we be using the normative data we use for our English-speaking clients for kids who speak other languages? Not when we have data available for languages across the world—which we do!

This study provides a cross-linguistic review of children’s acquisition of consonants in 27 languages. The authors reviewed 64 studies from 31 countries to inform practicing SLPs’…