There are four official languages in Switzerland, which means you have at least four possible ways of saying hello in this country. The four languages are German, French, Italian and Rumantsch. Bear in mind that especially in the big cities, most Swiss citizens can speak English quite well. Know which languages hoi an tourist map pdf commonly spoken in each region.
Swiss citizens speak Swiss-German, particularly throughout northern and central Switzerland. Bear in mind that many Swiss are multilingual. German is a good bet anywhere in the country, but you may be able to get by with French, Italian, or English regardless of the region. Most Swiss citizens speak at least some English, especially in the big cities.
The locals may be impressed if you make the effort to approach them using their native language, but you should be able to make your way around with English in most metropolitan areas. Bonus: the English “Hello” shares its roots with the German “Hallo,” so you might be briefly mistaken for German if you use the right tone. Take your cues from the locals and think before you speak. Listen to the people around you.