Early language support for monolingual and multilingual children is one of the central tasks of early childhood educators. To fulfill this task, early childhood professionals need a linguistically grounded foundational knowledge about child language acquisition and the language development trajectories of both monolingual and multilingual children. Therefore, this book first provides an overview of child language acquisition in the areas of pronunciation, vocabulary, and grammar, and derives from this a linguistically justified concept for everyday-integrated language support that is based on the language development stage of the children.