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 summed up by statistician Jean-Jacques Furer in 2005. In addition, linguist Regula Cathomas performed a detailed survey of everyday language use, published in 2008. Virtually all Romansh-speakers today are bilingual in Romansh and German. Whereas monolingual Romansh were still common at the beginning of the twentieth century, they are now only found among pre-school children. As Romansh linguist Ricarda Liver writes: The language situation today consists of a complex relationship between several diglossia, since there is a functional distribution within Romansh itself between the local dialect, the regional standard variety, and nowadays the pan-regional variety Rumantsch Grischun as well; and