The Pennsylvania Dutch (Pennsilfaanisch Deitsch) are a cultural group formed by early German-speaking immigrants to Pennsylvania and their descendants. This early wave of settlers, which would eventually coalesce to form the Pennsylvania Dutch, began in the late 17th century and concluded in the late 18th century. The majority of these immigrants originated in what is today southwestern Germany, i.e., Rhineland-Palatinate and Baden-Württemberg; other prominent groups were Alsatians, Swiss, and Huguenots (French Protestants). Historically they have spoken the dialect of German known as Pennsylvania German or Pennsylvania Dutch. In this context, the word "Dutch" does not refer to the Dutch people or their descendants, but to Deutsch (German).