【正确答案】正确答案：When two languages or language varieties exist together in a community and each one is used for different purposes, this is called diglossia. Usually, the more standard variety can be called the high variety or H-variety, which is used in government, the media, education, and for religious services. The other one is usually a non-prestige variety, the low variety or L-variety used in the family, with friends, when shopping, etc.