If you followed your study program entirely in French in Québec and present the diploma and academic transcripts that prove this, you automatically satisfy this condition.
Otherwise, you will have to present one of the following items to prove your knowledge of French:
complete academic transcript attesting to the successful completion of at least two years of secondary or post-secondary study in French pursued full time in Québec or abroad;
academic transcript attesting to the successful completion of a intermediate level French course in an educational institution recognized by the Ministère de l’Éducation, du Loisir et du Sport or in a university located in Québec; results attesting to the successful completion of a standardized oral French test at the intermediate level;
attestation of having satisfied the language requirements of a professional order in Québec.