National language

A national language is a language (or language variant, e.g. dialect) that has some connection—de facto or de jure—with a nation. The term is applied quite differently in various contexts. 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 languages are mentioned in over 150 world constitutions.^{[better source needed]}

C.M.B. Brann, with particular reference to India, suggests that there are "four quite distinctive meanings" for national language in a polity:

The last is usually given the title of official language. In some cases (e.g., the Philippines), several languages are designated as official and a national language is separately designated.

"National language" and "official language" are best understood as two concepts or legal categories with ranges of meaning that may coincide, or may be intentionally separate. Stateless nations are not in the position to legislate an official language, but their languages may be sufficiently distinct and well-preserved to be national languages. Some languages may be recognized popularly as "national languages", while others may enjoy official recognition in use or promotion.

In many African countries, some or all indigenous African languages are officially used, promoted, or expressly allowed to be promoted (usually taught in schools and written in important publications) as semi-official languages whether by long-term legislation or short-term, case-by-case executive (government) measures. To be official, spoken and written languages may enjoy government or federalised use, major tax-funded promotion or at least full tolerance as to their teaching and employers' recognition in public education, standing on equal footing with the official language(s). Further, they may enjoy recognition as a language used in compulsory schooling and treasury money may be spent to teach or encourage adults in learning a language which is a minority language in a particular area to restore its understanding and spread its moral stories, rhymes, poems, phrases, songs, and other literary heritage which will promote social cohesion (where other languages remain) or will promote nationalist differentiation where another, non-indigenous language is deprecated.

Bengali, the sole official language of Bangladesh, is also the de jure and de facto national language of the country. Establishing Bengali as a national language was one of the key reasons for the independence of Bangladesh.

Bosnia and Herzegovina de jure has three national languages - Bosnian, Croatian and Serbian - which are de facto varieties of one language, Serbo-Croatian. It is officially defined under the three names, corresponding to the country's constituent nations. The Latin and Cyrillic alphabets both have official and equal status.

Bulgarian is the sole official language in Bulgaria.