In French-speaking countries, where the tradition of ‘Bon Usage’ remains strong, many linguistic phenomena reflecting linguistic insecurity may still be observed. To accurately understand language attitudes, this study focused on hypercorrection and analyzed the mechanism and causes of this linguistic phenomenon. Based on earlier studies in French and English-speaking countries, we proposed a hypercorrection mechanism applicable to French-speaking countries based on the following considerations. First, hypercorrection occurs when a speaker moves between two varieties due to their mutual power relationship; importantly, this power relationship is not objective but subjective, and arises from various causes such as social class, space, and situation. Also, the two varieties reflect variation between or within speakers. This study is significant in helping to clarify the phenomenon of hypercorrection, which has previously only been analyzed based on language use between social classes.