All Canada Immigration programs include a mandatory requirement for the main applicant to take either the IELTS (English) or the TEF (French) language exams, and to provide the certificate as part of the immigration profile. Without this document the candidate will not be found eligible. It is not required for the spouse/partner of the main client to take a language test, but it is recommended as a way of improving the strength of the application.
Canada Citizenship Immigration Services offers an online language course with a focus on the exam you will need to pass for your eligibility.