A language designated by law to be employed in the public domain.
UNESCO. Education for all: literacy for life; EFA global monitoring report, 2006. Paris: UNESCO, 2006.
Policy and innovation in bilingual education can significantly improve minority language speakers’ mastery of official languages (UNESCO, 2014: 284).
UNESCO. Teaching and learning: achieving quality for all; EFA global monitoring report, 2013-2014. Paris: UNESCO, 2014.