Why are Idioms Important for CELPIP? Idioms are an important aspect of language proficiency, therefore, having a knowledge of idioms and being able to use them appropriately is relevant to language proficiency rating on the CELPIP (and IELTS) test. If you take a look at the CELPIP descriptors chart published by CELPIP.ca (download your copy at https://www.buymeacoffee.com/teacherdionne/e/142713 ),...