I can understand the problems you will have, as France prior to EASA didn't have national licences just approvals, I know an engineer that tried to convert his approvals over before EASA and got nowhere.
Similarly, secondhand, I was informed of a UK CAA licence holder of a full Danish EASA licence, having to sit courses in the UK to remove the limitations he didn't have on his Danish licence because on conversion the Danes did not add any to his Licence, before the UK would issue him a full UK EASA licence, (because in the UK they would have put the limitations on his Licence), all because he wanted to work back in the UK and they wouldn't recognise the none limited Danish Licence...... Even though he had in effect a clean EASA Licence...........
Hope you understand that.