Higher education can no longer be viewed as monolithic, bridges between universities and graduate schools in France and abroad, are so numerous that, especially for international students and bilingual such as ours, they must be designed as a flexible route and scalable to a certification in at least two countries.
The comments below are by necessity sketchy and incomplete. It is for each to learn, to use the sites of different preparatory classes, schools or universities, to participate in information meetings inside and outside the school, fairs to find the detailed information it needs.