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 in 1885. In 1919, the Lia Rumantscha was founded to serve as an umbrella organization for the various regional language societies. Additionally, the role of Romansh in schooling was strengthened, with the first Romansh school books being published in the 1830s and 1840s. Initially, these were merely translations of the German editions, but by the end of the 19th century teaching materials were introduced which took the local Romansh culture into consideration. Additionally, Romansh was introduced as a subject in teacher's college in 1860 and was recognized as an official language by the canton in 1880. Around the same time,