Yorkshire dialect is a geographic grouping of several dialects of English spoken in the Yorkshire region of Northern England. The varieties have roots in Old English and are influenced to a greater extent by Old Norse than Standard English is. Yorkshire experienced drastic dialect levelling in the 20th century, eroding many traditional features, though variation and even innovations persist, at both the regional and sub-regional levels. Organisations such as the Yorkshire Dialect Society and the East Riding Dialect Society exist to promote the survival of the more traditional features.