Austronesian language and Natural language

Austronesian language noun - The family of languages spoken in Australia and Formosa and Malaysia and Polynesia.

Natural language and Austronesian language are semantically related. In some cases you can use "Natural language" instead a noun phrase "Austronesian language".

Natural language noun - A human written or spoken language used by a community; opposed to e.g. a computer language.

Austronesian language and natural language are semantically related. Sometimes you can replace phrase "Austronesian language" with "Natural language", this phrases are similar.