National language 国家语言
(重定向自Majority language)
A national language is a language (or language variant, e.g. dialect) that has some connection—de facto or de jure—with a people and the territory they occupy. There is little consistency in the use of this term. One or more languages spoken as first languages in the territory of a country may be referred to informally or designated in legislation as national languages of the country. National and/or official languages are mentioned in over 150 world constitutions.