Romansh language and above reporting Romansh as their main language was 36,622 in 2012. Spoken by around 0.9% of Switzerland's 7.7 million inhabitants, Romansh is Switzerland's least-used national language in terms of number of speakers and ranks eleventh in terms of most spoken languages in Switzerland overall. The language area and number of speakers of Romansh have been continually shrinking, though language use remains vigorous in certain areas. Romansh is divided into five different regional dialects (Sursilvan, Sutsilvan, Surmiran, Putèr, and Vallader), each with its own standardized written language. In addition, a pan-regional variety called Rumantsch Grischun was introduced in 1982, which
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