In fact, the most important thing is that most of the mixed ethnic groups in Switzerland speak their own language. Because it is difficult to balance and unify, the official language of Switzerland is directly designated as four languages, so that most people in Switzerland are taken care of, and Swiss national managers will also build a platform to encourage everyone to learn these four languages at the same time. There is no language exclusively belonging to Swiss countries, which encourages racial harmony to some extent. Every national language has its own platform, which can be developed.
Switzerland is also a permanently neutral country. It has no political inclination, nor will it argue endlessly about things that have nothing to do with its own country. They don't have their own Swedish, just like their own country's survival strategy, they don't mobilize anything, and they don't distinguish the development of different places. It is their aim to live in harmony and treat each other as equals.
As long as it is a neutral country, there is no need to learn the language belonging to its own nation, and there is no need for domestic people to give up their preferred language. They don't speak Swedish, not only because they can't, but also because they really don't have this demand.