Nouns ending in -is are usually masculine.
Is français masculine or feminine?
lefrançais
The feminine form is française
The rule behind it
94.1% of -is nouns are masculine
In context
Je ne sais parler ni français ni allemand.
I can speak neither French nor German.
J'étudie le français depuis quatre ans maintenant.
I have been studying French four years now.
Je veux quelqu'un qui sache parler français.
I want a person who can speak French.