No, knowing the French language is not prerequisite to study in France. There are multiple universities in France that offer programs in English, mostly for master's and doctoral students. You can study there even if you don't know French. Still, it is a good idea to learn French. Knowing the language makes everyday life better, makes it easier to find part-time work, and can help you get a job when you finish school. Some programs might ask for proof that you know English (like IELTS or TOEFL scores) or French (DELF or DALF scores), depending on the specific program and school.