Linguistic boundaries

thumb|upright=1.7|French (green) and German (orange) language areas of Switzerland thumb|upright=1.2|French and Local Germanic dialect in the contact zone at the so-called "Röstigraben" ' (; , also transcribed to reflect the Swiss German pronunciation ) is a term used to refer to the cultural boundary between German-speaking Switzerland and Romandy, the French-speaking parts. There is also the term ', referring to the boundary between German-speaking cantons and the Italian-speaking canton of Ticino.

geolinguistic boundary between mutually intelligible speech communities