Question: What is the least popular language of the country that is separated by the Rhine river from the country where the Detlef Bothe scenes were shot in the film Spectre?

The Alpine Rhine begins in the most western part of the Swiss canton of Graubünden, and later forms the border between Switzerland to the West and Liechtenstein and later Austria to the East. Near Tamins-Reichenau the Anterior Rhine and the Posterior Rhine join and form the Rhine. The river makes a distinctive turn to the north near Chur. This section is nearly 86 km long, and descends from a height of 599 m to 396 m. It flows through a wide glacial alpine valley known as the Rhine Valley (German: Rheintal). Near Sargans a natural dam, only a few metres high, prevents it from flowing into the open Seeztal valley and then through Lake Walen and Lake Zurich into the river Aare. <SEP> nepal (, iso:), officially federal democratic republic of nepal, is a landlocked country in south asia. it is located mainly in the himalayas, but also includes parts of the indo-gangetic plain. with an estimated population of 26.4 million, it is 48th largest country by population and 93rd largest country by area. it borders china in the north and india in the south, east and west while bangladesh is located within only 27 km (17 mi) of its southeastern tip and bhutan is separated from it by the indian state of sikkim. nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the world's ten tallest mountains, including mount everest, the highest point on earth. kathmandu is the capital and the largest city. nepal is a multiethnic country with nepali as the official language. <SEP> In February 2015 over fifteen hundred extras were hired for the pre-title sequence set in Mexico, though they were duplicated in the film, giving the effect of around ten thousand extras. In addition to the principal cast, Alessandro Cremona was cast as Marco Sciarra, Stephanie Sigman was cast as Estrella, and Detlef Bothe was cast as a villain for scenes shot in Austria. <SEP> 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. <SEP> the rhine emerges from lake constance, flows generally westward, as the hochrhein, passes the rhine falls, and is joined by its major tributary, the river aare. the aare more than doubles the rhine's water discharge, to an average of nearly 1,000 m3/s (35,000 cu ft/s), and provides more than a fifth of the discharge at the dutch border. the aare also contains the waters from the 4,274 m (14,022 ft) summit of finsteraarhorn, the highest point of the rhine basin. the rhine roughly forms the german-swiss border from lake constance with the exceptions of the canton of schaffhausen and parts of the cantons of zürich and basel-stadt, until it turns north at the so-called rhine knee at basel, leaving switzerland.