MaNuEn: it is a master degree in Material Science for Nuclear Engineering
To be eligible for such a master program, you must have completed:
Either a Bachelor of Science or equivalent
Or a 1st master year or equivalent
Or a master of science or equivalent
There is no specific French requirement, but applicant should have sufficient French knowledge for everyday life in France (B1 level is recommended). However, in some countries, application must be done via French Embassy (Campus France) with specific French requirements demanded by the Embassy.
Level of English requirement depends on the chosen Master program.
The length of studies in France is one or two years depending of the chosen master.