First I must declare an interest as a Cornish speaking Cornishmen (there is no option on Italki that recognises the Cornish language). Cornish identity is very strong in some places, and many Cornish people do not consider themselves to be English, I am one of them. Until the Middle Ages it was often called 'West Wales', indeed the 'wall' bit of Cornwall comes from the same root as Wales, from an old English word for foreigner. The eldest son of the monarch is Duke of Cornwall as it was recognised that Cornwall was separate. However Cornwall is much smaller than either Scotland or Wales and the Cornish gentry did not resist assimilation. The current status of the British nations owes much to a long history, there is not adequate space here to explain it all.