A language island (a calque of German Sprachinsel; also language enclave, language pocket) is an enclave of a language that is surrounded by one or more different languages.[1] The term was introduced in 1847.[2] Many speakers of these languages also have their own distinct culture.
Language islands often form as a result of migration, colonization, imperialism, or trade without a common tongue. Language islands are common of indigenous peoples, especially in the Americas, where colonization has led them to isolate themselves greatly.