Children can learn to speak more than one language. They can learn languages at home, at school, or in the community. Some children can speak both languages easily. But sometimes they know one language better than the other. The language your child knows better is her dominant language. Over time, the dominant language may change. 

Learning Two Languages

Families Support Their Children Who Are Dual Language Learners | ECLKC

Can Special Needs Children be Bilingual? video