Romansh language published in 1703, though either the Catholic variety of Sursilvan or Putèr was more commonly used there until the 20th century. In the 16th century, the language border between Romansh and German largely stabilized, and it remained almost unchanged until the late 19th century. During this period, only isolated areas became German-speaking, mainly a few villages around Thusis and the village of Samnaun. In the case of Samnaun, the inhabitants adopted the Bavarian dialect of neighboring Tyrol, making Samnaun the only municipality of Switzerland where a Bavarian dialect is spoken. The Vinschgau in South Tyrol was still Romansh-speaking in the
Romansh language speakers, but the regional varieties could continue to be used when addressing a single region or municipality. In schools, Rumantsch Grischun was not to replace the regional dialects but only be taught passively. The compromise was largely accepted by both sides. A further recommendation in 1999, known as the "Haltinger concept", also proposed that the regional varieties should remain the basis of the Romansh schools, with Rumantsch Grischun being introduced in middle school and secondary school. The government of Grisons then took steps to strengthen the role of Rumantsch Grischun as an official language. Since the cantonal constitution explicitly named