The use of two or more languages as mediums of instruction.
UNESCO. « Education in a multilingual world: UNESCO education position paper », 2003.
Some countries have propounded programmes aimed at better meeting the needs of populations with specific cultural, social and ethnic characteristics; for instance, projects focusing on intercultural, bilingual education (in the mother tongue and the official language). Some such programmes have gone nationwide, as in Mexico, Bolivia, Ecuador and Paraguay (Vaillant, 2005: 25).
Vaillant, Denise. Education reforms and teachers’ unions: avenues for action. Fundamentals of Educational Planning82. Paris: UNESCO-IIEP, 2005.