Passports and Documents
The documents needed vary between each country and the purpose of the stay.
Passports: If you are in the European Union of Countries you have the same passport and can travel between countries freely with your National identification card.
Visas: Visas are needed if you going to be in a country for three months or more.
French is Everywhere
French is spoken in more places than just France. It is spoken in Switzerland, Belgium, Monaco, Luxembourg and 26 countries in Africa. Each place has a different culture and is diverse, so no matter where you go you'll always see new things.