Yes, in Newquay and throughout Cornwall a unique local dialect is spoken, called Cornish English. This dialect is influenced by Cornwall's Celtic heritage and is characterized by its own vocabulary and pronunciation. You will often hear expressions such as "dreckly" (straight), "ansum" (great) and "mizzle" (misty rain) from locals. However, most locals speak a version closer to standard English, so visitors usually don't have too much trouble understanding them.