Natlang, which stands for "natural language," refers to any language that has evolved organically over time, without being artificially constructed or planned. There are several synonyms for this term. One such synonym is "vernacular," which is used to describe the language or dialect spoken by a specific group of people in a particular area. Another synonym is "mother tongue," which refers to a person's first language or the language they learned at home while growing up. Other synonyms for natlang include "living language," "indigenous language," and "spontaneous language," all of which emphasize the natural, non-planned nature of the language. Regardless of the synonym used, natlangs remain an important component of human culture and communication.