DALF C1 and C2: the two highest French levels
The DALF (Diplôme Approfondi de Langue Française) certifies the two highest CEFR levels: C1, called "autonomous", and C2, called "mastery". Unlike the DELF, where you progress from A1 to B2, the DALF targets already very advanced candidates, and each level is prepared and taken independently.
DALF C1: the proficient user
At C1 level, you can understand long and complex texts, grasp implicit meanings, and express yourself spontaneously and fluently on social, professional or academic topics, with rich vocabulary and structured speech. This is the level most commonly required for entry into grandes écoles and certain selective master's programmes.
DALF C2: near-native mastery
The C2 level goes further: it involves a fine, nuanced mastery of the language, with fluency comparable to that of an educated native speaker, including on abstract or specialized topics. This level is rarely required as such: it is more sought after by candidates wishing to certify an excellent level, for example for teaching French or certain professions with high demands on written and oral expression.
How to choose between the two?
When in doubt, it is better to aim for the DALF C1, which is largely sufficient for almost all academic and professional processes, and only move towards C2 if your goal explicitly requires it. For details on the skills assessed at each level, check the official presentation of the DALF by France Éducation International.