If you are between 18 and 54 years of age on the day you sign your citizenship application, you must provide proof of language proficiency in English or French. This can include results from approved language tests (e.g., IELTS, CELPIP, TEF), proof of secondary/post-secondary education in English or French, or government-funded language training. However, if you are under 18 or 55 and older, you are exempt from providing a language test. IRCC requires a Canadian Language Benchmark (CLB) level 4 or higher to meet this requirement.