It can be used in several ways:
* The French language: *J'apprends le français.* (I am learning French.)
* The French people: *Les Français sont très accueillants.* (The French people are very welcoming.)
* French culture: *Le cinéma français est célèbre dans le monde entier.* (French cinema is famous all over the world.)
It's important to note that "le Français" is masculine, so it needs a masculine article ("le"). You can also use the feminine form "la Française" to refer to a French woman.