1. List the languages you have mastered: in the skills or qualifications section of your resume, list the languages you have mastered, such as English, Chinese and French.
2. Explain the language level: while listing languages, you can use short descriptions to explain the language level, such as "proficient", "proficient", "fluent" and "basic mastery".
3. Provide language proof: If you have relevant language proof, such as TOEFL, IELTS, Cambridge English and other certificates, you can indicate it in your resume and provide the certificate number or score.