Common

Actually, the language of Norfolk and Wessex, which has spread across the entire north.
This is basically English.

Geographical Distribution

Native to Norfolk and Wessex in the Kingdom; Oceanside; Lenay, especially in the lowlands and central regions; Bayport and Elfheim; and most of the Free Cities (Waynesburg, Hillsburg, Dassal, etc.)
Spoken throughout almost the entire northwest. It is the lingua franca.