> And degrees are only 3 years in France.

Uh, no, France follows the European-wide bachelor's master's doctorate system when it comes to granting european credits. Which means that, yes, you can follow the normal cycle of 3 years (license/bachelor's), 5 years (masters), 7 years (doctorage), and these will basically count if you're looking to study abroad.

Some of my coworkers have 2 years of studies (IUT/BTS). Some have 4 (M1). Some of the PhDs in my company have 9 years, other 11, others are both working and researching at the same time. There's no mandatory 3 years.

I'm not sure how anything you said refutes what I said.

Can you clarify?

European citizen, or EU citizen?

I think European Citizen, it's been a while since I checked but they specifically mentioned Swiss citizens in the documents that I read.