Romansh language the most comprehensive collection of Romansh words, which can also be used in the idioms with the necessary phonetic shifts. The signatories of "Pro Rumantsch" stress that Romansh needs both the idioms and Rumantsch Grischun if it is to improve its chances in today's communication society. In Switzerland, official language use is governed by the "territorial principle": Cantonal law determines which of the four national languages enjoys official status in which part of the territory. Only the federal administration is officially quadrilingual. Romansh is an official language at the federal level, one of the three official languages of the Canton
Romansh language Ladin (Putèr and Vallader) to have equal official standing. No explicit mention of any official language was made in the cantonal constitutions of 1803, 1814, and 1854. The constitution of 1880 declared that "The three languages of the Canton are guaranteed as national languages, without specifying anywhere which three languages are meant. The new cantonal constitution of 2004 recognizes German, Italian, and Romansh as equal national and official languages of the canton. The canton used the Romansh varieties Sursilvan and Vallader up until 1997, when Rumantsch Grischun was added and use of Sursilvan and Vallader was discontinued in 2001. This