There are various synonyms for the term "regional language". Some of the commonly used synonyms include vernacular, local language, native language, provincial language, dialect, and ethnic language. These terms are often used interchangeably to refer to a language that is spoken in a specific geographical area or community. Regional languages help to preserve the cultural heritage and identity of communities and are an important means of communication and expression. With the increasing globalization and the dominance of mainstream languages, the promotion and preservation of regional languages have become more crucial to maintaining the diversity and richness of humanity's cultural heritage.