No, several courses especially in engineering (all branches), management, hospitality, fashion studies, economics, etc are available in English. However, it is a good idea to start on French to make your stay even more rewarding and fruitful.

Knowledge of French will enable you to benefit more fully from your stay and to get more out of life in France. Learning the language will also help you with practical matters such as buying groceries, understanding directions and instructions, paying bills, etc. If your French isn't as good as you'd like, take some courses in France or in your home country.