IELTS Official - You may know what CEFR (Common European Framework of Reference for Languages) level you are in English, but what does that mean in IELTS? Here is a simple overview
CEFR Hours per level English: How long does it take to advance? - English Express
CEFR Language Levels Explained - Klik2learn
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International English Language Testing System - Wikipedia
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Language Levels – inlingua Tirol
A Comparison of the CEFR Level and IELTS 2024
What is your English Level A1 A2 B1 B2 C1 C2? | by International English Test | Medium
International language standards | Cambridge English