sentences:  Romansh was formerly considered a group of Italian dialects, but Switzerland declared Romansh a national language in 1938 in reaction to the fascist Italian irredentism at the time.As elsewhere in Western Europe, immigration to Switzerland has increased dramatically since the 1960s, 
  so that a large proportion of the resident population of Switzerland are now not descended or only partially descended from the core ethno-linguistic groups listed above.As of 2011, 37% of total resident population of Switzerland had immigrant background.