* Geneva
* Vaud
* Fribourg (bilingual, with German)
* Valais (bilingual, with German)
* Neuchâtel
* Jura
* Bern (partially, in the western parts)
It's important to note that French is an official language in all of Switzerland, but it's primarily spoken in Romandie.
While German is the most spoken language overall, French is the second most spoken language in Switzerland, with a significant number of Swiss citizens being fluent in French.