Language and culture are closely intertwined. Culture shapes language use and form, while language expresses cultural identity. The relationship between language and culture can be studied both synchronically and diachronically, as languages and cultures evolve over time through historical development. Comparative methods can also be used to study cultural relationships by comparing languages. The document discusses establishing the genealogical relationship between the languages and cultures of South Halmahera through reconstructing their proto-language and subgroupings to determine linguistic evidence of their shared origins and evolution over time.