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
Candidates have to write a specific file which is reviewed by the admission committee.
There is no specific French requirement, but applicant should have sufficient French knowledge to understand courses (B2 level is recommended). However, in some countries, application must be done via French Embassy (Campus France) with specific French requirements demanded by the Embassy.
The length of studies in France is one or two years depending on the chosen master.