> "Aberdonians, Glaswegians, Edinburghers, residents of the Kingdom of Fife, Teuchters and all the rest have different accents and different dialects but they don't speak different languages."
Spend some time in places like the Shetlands Islands or the Orkney Islands and the dialect vs language distinction is much more debateable, given the number of distinct words borrowed from the Norn language.