1) Language both expresses and embodies cultural reality, helping to perpetuate culture while also reflecting cultural changes.
2) Culture completely includes language as a subsystem, and the structures of different languages influence how people think and behave.
3) A standard dialect is a socially prestigious dialect used formally and taught in schools, based on a selected regional variety considered the political/commercial center. Pidgins mix languages for limited use, and become creoles when acquired natively by a community.