Swiss german is only a collective name for all the dialects we speak, the main serious and formal written language is Schweizer Hochdeutsch (eg. parliaments, railways, busses, package labeling, all "non-love-letter" :-), etc.).

de_CH is Swiss Standard German, and not a dialect or Schwiizerdütsch, it has some different nouns for, some examples https://de.wikipedia.org/wiki/Schwei...tsch#Beispiele