Romansh language of Grisons, and is a working language in various districts and numerous municipalities within the canton. The first Swiss constitution of 1848, as well as the subsequent revision of 1872, make no mention of Romansh, which at the time was not a working language of the Canton of Grisons either. The federal government did finance a translation of the constitution into the two Romansh varieties Sursilvan and Vallader in 1872, noting however that these did not carry the force of law. Romansh became a national language of Switzerland in 1938, following a referendum. However, a distinction was introduced between "national
Romansh language around them remained Romansh-speaking longer. The shift to German was caused in particular by the influence of the local German-speaking élites and by German-speaking immigrants from the north, with the lower and rural classes retaining Romansh longer. In addition, beginning around 1270, the German-speaking Walser began settling in sparsely populated or uninhabited areas within the Romansh-speaking heartland. The Walser sometimes expanded into Romansh-speaking areas from their original settlements, which then often became German-speaking, such as Davos, Schanfigg, the Prättigau, Schams, and Valendas, which became German-speaking by the 14th century. In rare cases, these Walser settlements were eventually assimilated by their