As of 2018, the "fide" exam is one of the methods for demonstrating the language competence required for naturalization. We are in Vaud, btw.

I've been told that there are practice materials available online but have not been able to find them. The material available on the website above seems to be for teachers and formateurs/trices. Has anyone found material aimed at the language learners?

Thanks!

From what I can see, start from this page. You will need to sign up first before you have access to the information that is in the left column. They seem to have some resources for people who have to take a test.

Link: https://www.fide-info.ch/fr/sprachniveaus