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Simply put, in the French education system, M1 refers to the 1st year programme or fundamentals. Whereas, the M2 refers to the final or the specialisation year. Basically, international students who have a 3 year bachelors, they would go for a M1 master of 2 years (irrespective of their work experience). And international students who already have a 4 year bachelors, they can directly go for M2 (1 year specialisation masters).
And this rule is applicable only for MSc programmes across France not for MIM, MBA, EMBA etc.
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