Triglossia points out the daily active use of three language varieties within the same community.
Triglossia refers to the use of three distinct language varieties or dialects within a single speech community. Triglossia is a sociolinguistic situation where three distinct language varieties coexist within a single speech community, each serving different functions or domains of use. This complex form of language variation provides insight into how multiple language varieties interact and coexist within a community.
For example, in Luxembourg triglossia is common, as Luxemburgish is used for everyday communication, French dominates in legal and administrative matters, and German is used in media and education.
We find other cases of triglossia in Egypt, where people use Egyptian Arabic, Modern Standard Arabic, and English/French, or in Tanzania, where inhabitants use English, Swahili, and local ethnic languages based on the setting and situation.
For a deeper explanation on a similar term to triglossia, diglossia, refer to the term page about Diglossia.