Natural language and Native tongue

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

Native tongue and natural language are semantically related in mother tongue topic. In some cases you can use "Native tongue" instead a noun phrase "Natural language", when it comes to topics like native language.

Natural language and native tongue are semantically related in mother tongue topic. You can use "Natural language" instead a noun phrase "Native tongue", if it concerns topics such as native language.