At the C1 CEFR level, a language learner:

  • Can understand a wide range of demanding, longer clauses, and recognize implicit meaning.
  • Can express ideas fluently and spontaneously without much obvious searching for expressions.
  • Can use language flexibly and effectively for social, academic, and professional purposes.
  • Can produce clear, well-structured, detailed text on complex subjects, showing controlled use of organizational patterns, connectors, and cohesive devices.