LanguageCert Level 2 Certificate in ESOL International (Listening, Reading, Writing, Speaking) (LanguageCert General C1), Ofqual Qualification Number: 610/1455/2 LanguageCert International ESOL, C1 level certificate holder can understand a wide range of demanding texts and recognise implicit meaning, use language fluently and spontaneously, engage in discussion, making clear and effective contributions, produce well-structured, detailed text on complex subjects and communicate ideas effectively. For more information please refer to the Common European Framework of Reference (CEFR).