For comparison purposes, tuition fees in a French public engineering school were around 700€/$800 per year when I was there about a decade ago, and I wouldn't expect this to have changed much.
This is without considering students whose parents have low revenue, thus getting access to financial help from the government. This was my case. Technically, I was paid to go to University, with 3600€ per year for being one of the top students.
For more comparison, tuition feeds at my alma mater (a German university) were 500€ per year. Most of that was for the semester ticket, that allowed me to use public transit completely for free across the entire state (Saxony).
> I checked Epitech tuition fees, it's around 40k€ for the whole 5 years curriculum
$9100 a year is indeed expensive for French schools, but I'm sure some Americans on the other side of the ponds are chuckling right now.