Inscrivez-vous ou connectez-vous pour rejoindre votre communauté professionnelle.
It will always be a choice but it is up the individual to decide whether or not they can achieve all they want to achieve without it!
English is becoming a global language, so if someone wants to join the global society, it is a must, otherwise, it is a choice.
I think it is mandatory because english is the most widely used in the world and in a sense it is truly a single global language.
It is a choice
It is a choice but mostly it becomes mandatory for seeking education, specially higher education.