CEFR Level C1 means:
- you can understand a wide range of demanding, longer texts, and recognise implicit meaning.
- you can express him/herself fluently and spontaneously without much obvious searching for expressions.
- you can use language flexibly and effectively for social, academic and professional purposes.
- you can produce clear, well-structured, detailed text on complex subjects, showing controlled use of organisational patterns, connectors and
cohesive devices.