This document discusses the complex relationship between language and dialect. It begins by defining key terms like language, dialect, accent, and register. It then examines different ways languages and dialects have been categorized, such as by mutual intelligibility, prestige, size, and through the family tree model of tracing linguistic descent. However, the document notes there is no clear distinction between language and dialect, as variations exist on a continuum. Factors like politics, history and social perceptions further complicate defining and delimiting languages versus dialects.