Isolated Languages

A Pre-Indo-European Survivor : Basque -

An Unchanging Language : Icelandic -

Basque - the only language currently spoken in Europe that survives from the period before the arrival of Indo-European speakers.
Spoken by - 1 mill in Pyrenees Mountains of northern Spain and southwestern France.
Isolation - helped preserve their language in the face of the wide diffusion of Indo-European languages.

Significance - has changed less than any other in the Germanic branch.
Why speak - because ancestors migrated to the island from east(Norway) in A.D. 874.

Arose through lack of interaction with speakers of other languages.