I've watched some peppa pig videos and I feel like she lives in the uk she doesn't live in America or France she traveled there before
My guess is that she loves by the coast of the British isles because in one episode her town flooded
Or its that she was raised in England but then moved to the Rotterdam area in the Netherlands since the Netherlands does flood alot and the dams won't fix the flooding of the lowlands
And if both of these theories are false the only place that floods like the Netherlands and have an accent like the United Kingdom is Ireland
Probably somewhere near Dublin or in the southwest of the island