French, German, Italian and Romansh in Switzerland) Regional official language (e.g. Igbo in Nigeria; Marathi in Maharashtra, India) Promoted language – lacks official status on a national or regional level but is promoted and sometimes used by public authorities for specific functions (e.g. Spanish in New Mexico; West African Pidgin English in Cameroon) Tolerated language – neither promoted nor proscribed; acknowledged but ignored (e.g. Native American languages in the United States in the present day) Proscribed language – discouraged by official sanction or restriction (e.g. Galician, Basque and Catalan during Francisco Franco's regime in Spain; Macedonian in Greece; indigenous American languages during the boarding school era) Vitality – the ratio, or percent, of users of a language to another variable, such as the total population. Kloss and Stewart both distinguish six classes of statistical distribution. However, they draw the line between classes at different percentages. According to Kloss, the highest level of vitality is demarcated by 90% or more speakers, followed by 70%, 40%, 20%, 3%, and less than 3%. According to Stewart, the six classes are determined by the following percentages of speakers: 75%, 50%, 25%, 10%, 5%, and less than 5%. William Stewart outlines ten functional domains in language planning: Official – An official language "function[s] as a legally appropriate language for all politically and culturally representative purposes on a nationwide basis." The official function of a language is often specified in a constitution. Provincial – A provincial language functions as an official language for a geographic area smaller than a nation, typically a province or region (e.g. French in Quebec) Wider communication – A language of wider communication may be official or provincial, but more importantly, it functions as a medium of communication across language boundaries within a nation (e.g. Hindi in India; Swahili language in East Africa) International – An international language functions as a medium of communication across national boundaries (e.g. English, formerly French as a diplomatic and international language) Capital – A capital language functions as a prominent language in and around a national capital (e.g. Dutch and French in Brussels) Group – A group language functions as a conventional language among the members of a single cultural or ethnic group Educational – An educational language functions as a medium of instruction in primary and secondary schools on a regional or national basis (Urdu in West Pakistan and Bengali in East Pakistan) School subject