While IELTS is a common English language test accepted for Australian visas, you can migrate without IELTS if you provide results from other approved English proficiency tests such as TOEFL, PTE Academic, or Cambridge English. Some visa categories may waive English test requirements if you are a citizen of an English-speaking country or meet certain exemptions. However, demonstrating English language proficiency is generally mandatory for skilled migration visas, as it affects your points score and eligibility.