If you need to study a spoken language that has never been written, and you need to identify all the sounds, meanings, and grammatical rules for that language, which type of linguistics would be most helpful?
Because you want to study a spoken language that don't have never been written, the best way to learn it is just find a person who could speak both the language you want to learn and you native language. This way you can directly know what the meaning of words are. Like me I learned an Chinese local language with my parents when i was little. It make me can speak that language.
