Ich wünsche Ihnen einen schönen Tag!
In Swiss German, you wouldn't normally say something that literally means "have a good day." People do say "gnüss de schöni Tag" (enjoy the nice day), which is very casual. You could also say "ne schöni Tag" or "ne schöni Tag noa." But generally the normally Swiss German good-bye is "Wiadaluaga." Even so, it's also just fine to use the High German "Auf Wiedersehen."
no problem
In High German it's "Schmetterling"; in Swiss German they also sometimes say "Sommervogel."
In Swiss German flowers are Blumen.
Ig
Schweizer
In Switzerland, the official languages are German, French, Italian, and Romansh. To say "hi" in Swiss German, you can say "Hoi" or "Hallo." In Swiss French, you can say "Salut." In Swiss Italian, you can say "Ciao."
volk
STRASE
Flugzüg
no problem
Falke