The federal framework behind migrant language courses and the language passport.
Details
fide is Switzerland's federally backed system for teaching and certifying everyday German, French and Italian for migrants, defining both the course methodology and the fide test. Passing it produces the Sprachnachweis or Passeport des langues, the document cantons ask for when you renew a permit, apply for a C permit or naturalise. Courses following the fide method are widely subsidised by cantons; the test itself is paid. Start here to understand which level you need, then find a fide-recognised course through your canton. Note the site moved from fide-info.ch to fide-service.ch.