norn

Okay, so Norn was a North Germanic language closely related to the Faroese and Norwegian languages and slightly more distantly related to Icelandic, Danish, and Swedish that was spoken in the Northern Isles (Orkney and Shetland) off the North Coast of Scotland (yes, I am copying the wikipedia...

Here is a linguistic map of Scotland from the year 1400. As you can see, the Scandinavian language, Norn, was spoken in Orkney, Sheltand, and Caithness. Norn would linger on until the 18th century. The ATL in this scenario is that Norn manages to survive intact at 'commoner level' until at...