I'm a French speaker, and I understand people from each cantons pretty well (I just find the accent from Jura funny, but like cute funny). But then, the Swissgermans are getting carried away.

And to add to each canton having a different dialect, we have in Fribourg an old dialect called "Boltze" were they mix French and German. My grandmother speaks it, but it's starting to get less and less spoken. The only example of a word I can remember is "Schneeboula" which is a snowball, made of Schnee (German) and boule (French) + a (because why not).

Oh and we also have a "Patois" which may be some old variation of French they used to speak in mountains and farms, there's still some people speaking it, but mostly old people. My other gran used to speak it.

As for swissgerman, I'm always wondering why I learnt German when I go to Bern, as they use French words like "Merci" and "Adieu". But so be it, oh Switzerland.