> It's a pain to phrase, but: There is no reason to use the Swiss flag to indicate a language. French has the French flag. German has the German flag. Etc. There are dialects, as a nuance to this, but you can solve that by e.g. using a 50/50 merge of the German and Swiss flags.
Okay, which flag do you use to indicate https://en.wikipedia.org/wiki/Romansh_language — one of the four official languages of Switzerland?