Koiné language
In linguistics, a koine or koiné language or dialect (pronounced /ˈkɔɪneɪ/; from Ancient Greek κοινή 'common') is a standard or common dialect that has arisen as a result of the contact, mixing, and often simplification of two or more mutually intelligible varieties of the same language.[1][2]
Not to be confused with Koine Greek.
As speakers already understood one another before the advent of the koiné, the process of koineization is not as drastic as pidginization and creolization. Unlike pidginization and creolization, there is often no prestige dialect target involved in koineization.
The normal influence between neighbouring dialects is not regarded as koineization. A koiné variety emerges as a new spoken variety in addition to the originating dialects. It does not change any existing dialect, which distinguishes koineization from the normal evolution of dialects.[3]
While similar to zonal auxiliary languages, koiné languages arise naturally, rather than being constructed.