Differences in cultures are more substantial than whether members of a community eat white bread, corn pone, or tortillas. The behavior of people varies, and the beliefs, values, and assumptions that underlie behavior differ as well. Culture influences both behavior and the psychological processes on which it rests. Culture forms a prism through which members of a group see the world and create shared meanings. And a group's culture is reflected by the group's language.
Child development follows a pattern similar to that of culture.
Major structural changes in children, such as language learning, arise from the interaction of biology and experience. Such changes are remarkably similar in kind and sequence among cultural groups. Learning a primary language is a developmental milestone. However, which language a child learns and the uses to which that language is put are determined by the culture. As the ideas from a child's social world are brought to bear through the guidance of the older members of the community, children come to share meanings with their elders.