Romansh language Grisons, the language borders largely stabilized in the 16th century and remained almost unchanged until the 19th century. This language area is often called the "Traditional Romansh-speaking territory", a term introduced by the statistician Jean-Jacques Furer based on the results of the Swiss censuses. Furer defines this language area as those municipalities in which a majority declared Romansh as their mother tongue in any of the first four Swiss censuses between 1860 and 1888. In addition, he includes Fürstenau. This represented 121 municipalities at the time, corresponding to 116 present-day municipalities. The villages of Samnaun, Sils im Domleschg, Masein, and
Romansh language the Romansh area into two geographically non-connected parts. In the 1920s and 1930s the rest of the villages in the valley became mainly German-speaking, sealing the split. In order to halt the decline of Romansh, the Lia Rumantscha began establishing Romansh day care schools, called "Scoletas", beginning in the 1940s with the aim of reintroducing Romansh to children. Although the "Scoletas" had some success – of the ten villages where Scoletas were established, the children began speaking Romansh amongst themselves in four, with the children in four others acquiring at least some knowledge of Romansh – the program ultimately failed