Welsh cuisine butter was the primary cooking medium and basis for sauces. Salt was an important ingredient in Welsh butter, but also in early Welsh cheeses, which would sit in brine during the cheesemaking process. The Welsh were also early adopters of roasting cheese. An early incarnation of Welsh rarebit was being made in medieval times, and by the middle of the 15th century rarebit was considered a national dish. The acid soil of Wales meant that the milk produced by their cattle created a soft cheese, which was not as good for roasting, so Welsh people would trade for harder cheeses
History of the Welsh language (Breton, Cornish, and the extinct Cumbric). It is not clear when Welsh became distinct. Kenneth H. Jackson suggested that the evolution in syllabic structure and sound pattern was complete by around 550, and labeled the period between then and about 800 "Primitive Welsh". This Primitive Welsh may have been spoken in both Wales and the Hen Ogledd ("Old North"), the Brythonic-speaking areas of what is now northern England and southern Scotland, and therefore been the ancestor of Cumbric as well as Welsh. Jackson, however, believed that the two varieties were already distinct by that time. The earliest Welsh poetry –