(retronym, linguistics) Any human language that has evolved naturally in a community, usually in contrast to computer programming languages, to controlled natural languages, and to constructed languages such as Esperanto (although constructed languages are subject to change by natural forces among fluent speakers).

plural of natural language

A field of computer science and linguistics concerned with the interactions between computers and human (natural) languages, especially computational analysis and processing of large amounts of natural language data.

A subtopic of natural language processing in artificial intelligence that deals with machine reading comprehension.

plural of natural language understanding