Moving to France with 2 Bunnies?

You have no clue what you are doing... rabbits can be sexed from 3 weeks old, so 'pet shop' assistant knows NOTHING at all and told you nonsense information just to make a sale.
Forget ESA, they don't exist in Europe, thank god!  SO if you can't function without your security blanket rabbits which you have only had for a few weeks ( so how did you manage before that) then don't go and study on the other side of the world. Stay where you are
You will not be allowed to rent a place and have rabbits and you will not be allowed to travel 'with' the rabbits unless travelling using an American airline that allows them.
To travel they will be required to have full vet vaccinations,  must be accompanied by a supporting document compliant with the model provided in Annex 27 of the Order of 19 July 2002, signed by a practising veterinarian import licenses and cost of import travel and vet checks will be more than your flight costs...In addition, if you fail to comply with the health requirements , you commit a customs offence (Article 414 of the Customs Code), the penalty for which is a fine and imprisonment for up to three years, confiscation of the animals which could be PTS....suggest you leave your rabbits in the US if you are travelling to study in France

Rabbits can reproduce as early as 10 weeks, and anyone even halfway competent can sex them from 6-8 weeks on. Here's a site that will help you. https://debmark.com/rabbits/sexing.htm If you don't know their sexes, I hope you've kept them apart, or you may well have a surprise in about a month. 

ESAs are not a "thing" outside the USA and will do you absolutely no good at all to designate them as such. Rabbits are extremely stressed by travel and I would not bring them on a trans-atlantic flight even if you can. It was a very bad idea to purchase rabbits knowing you are going to France for an extended period soon. 

Don't put the bunnies through that. Rabbits scare easily and can have a heart attack. You haven't had them that long, and they are young. Rehome them now, or call a bunny rescue group. It will be hard to find housing that approves them, and they smell and apt neighbors could complain. You're going to be busy studying. Get a fish bowl or fish tank when you get there. More landlord friendly, and fish are known to have a calming effect on anxiety and depression.

You obviously have not looked up France'S rules on taking pets into their country. They could need need various vaccines and might need quarantine. Also does France have ESA animals ? And where are you going to live during your studies! Would you be allowed to have them in a house? The French are not great animal lovers, they eat rabbit, not sure if they have them as pets.
Do your research.

Please home them here in the USA. They probably wont survive the flight. They scare too easily and they are placed by the wheel mounts on the airplane where it can get a bit way too loud for bunnies. Too darned startling noisy for them there for sure, they will die! Literally...When you get to France, get the beautiful french bunnies at their pet shop (prepare to go catch yourself one if they don't have non wild ones for sale that are not already stiff n skinned) You might consider getting a sweet cat if this is the case. If you have ever seen Ratatouli, then you know France definately has many rats and mice. On the plus side, the neighbors won't want to eat your cat and you won't have a rodent problem unless France has rodents the size New York has...the size of a cat! In which case, maybe considering a dog even. Ohhh, some of the comments before me.? Wow, I took it and ran a bit with it. Lol..Some seriousness with a bit of twisted teasing and laughter in the morning never hurt no one I guess. Please re home your two beautiful rabbits so they don't fright and die. Enjoy your day and may God keep you safe in your travels, help you find another bunny in France, not stiff and skinned and ready for the stew pot, always. Sincerely, Kelly