Arth is a village, a town, and a municipality in Schwyz District in the canton of Schwyz in Switzerland. The municipality consists of the villages Arth, Oberarth, and Goldau. The four settlements Rigi Kulm, Rigi First, Rigi Klösterli, and Rigi Staffel on the mountain Rigi to the west of Arth are also part of the municipality. The official language of Arth is (the Swiss variety of Standard) German, but the main spoken language is the local variant of the Alemannic Swiss German dialect. Wikipedia