The Shetland Dictionary 3rd edition

Shetland was a dependency of Norway until 1468, then becoming subject to Denmark until handed over to Scotland in 1649 as the dowry pledge of the Princess Margaret of Denmark when she was married to King James III of Scotland. From about ad800, Shetland was Scandinavian in culture and speech. Norn, the local variant of Colonial West Norse, was still being written in the fifteenth century. It survived, precariously and without recognized status, as the usual speech of the islands until the mid‐nineteenth century despite steady erosion by Scots, the more prestigious language of Church, law court, and commerce.

The...