What is the least popular official language of the country where Valais is located?
Romansh
Title: Balfrin
Passage: The Balfrin is a mountain of the Swiss Pennine Alps, located north of the Dom in the canton of Valais. It belongs to the Mischabel massif, which lies between the Mattertal and the Saastal.
Title: Tsa de l'Ano
Passage: The Tsa de l'Ano is a mountain of the Swiss Pennine Alps, located east of Les Haudères in the canton of Valais.
Title: La Luette
Passage: La Luette is a mountain of the Pennine Alps, located between the valleys of Bagnes and Hérens in the canton of Valais. It lies just south of Le Pleureur.
Title: Lac du Grand Désert
Passage: Lac du Grand Désert is a lake in the canton of Valais, Switzerland. It is located at an elevation of 2642 m, fed by the Grand Désert Glacier.
Title: Hockenhorn
Passage: The Hockenhorn is a mountain of the Bernese Alps, located on the border between the Swiss cantons of Bern and Valais. Its summit is 3,293 metres high and lies between the upper Kandertal and the Lötschental. On its southern (Valais) side lies a glacier named "Milibachgletscher".
Title: Gross Furkahorn
Passage: The Gross Furkahorn is a mountain of the Urner Alps, located on the border between the Swiss cantons of Valais and Uri. It lies north of the Furka Pass and east of the Rhone Glacier.
Title: Fluchthorn (Pennine Alps)
Passage: The Fluchthorn is a mountain of the Swiss Pennine Alps, located south of Saas-Almagell in the canton of Valais. It lies east of the Strahlhorn.
Title: Alps
Passage: The severe weather in the Alps has been studied since the 18th century; particularly the weather patterns such as the seasonal foehn wind. Numerous weather stations were placed in the mountains early in the early 20th century, providing continuous data for climatologists. Some of the valleys are quite arid such as the Aosta valley in Italy, the Maurienne in France, the Valais in Switzerland, and northern Tyrol.
Title: Platthorn
Passage: The Platthorn is a mountain of the Swiss Pennine Alps, located south of Grächen in the canton of Valais. It lies north of the Färichhorn and the Balfrin, on the range between the Mattertal and the Saastal.
Title: Pic d'Artsinol
Passage: Pic d'Artsinol (also Pic d'Arzinol) is a mountain of the Pennine Alps, located west of Evolène in the canton of Valais.
Title: Switzerland
Passage: Switzerland has four official languages: principally German (63.5% total population share, with foreign residents, in 2013); French (22.5%) in the west; and Italian (8.1%) in the south. The fourth official language, Romansh (0.5%), is a Romance language spoken locally in the southeastern trilingual canton of Graubünden, and is designated by Article 4 of the Federal Constitution as a national language along with German, French, and Italian, and in Article 70 as an official language if the authorities communicate with persons who speak Romansh. However, federal laws and other official acts do not need to be decreed in Romansh.
Title: Färichhorn
Passage: The Färichhorn is a mountain of the Pennine Alps, located between the Mattertal and the Saastal in the canton of Valais. It lies north of the Balfrin, at a height of 3,292 metres above sea level.
Alps Switzerland