 After a brief historical note on the linguistic preoccupations of legal philosophers in section 1, section 2 outlines the relation between the law of a jurisdiction and the language with which law can be made and in which it can be expressed. Section 3 surveys philosophical work on the nature of law that rejects a preconception that you can find in this introduction and in sections 1 and 2: that law can be made by the use of language. Section 4 addresses the implications for legal philosophy of the widespread use of evaluative language in law, and section 5 addresses the implications for legal philosophy of the widespread use of vague language in law. Section 6 concludes with an assessment of philosophers’ efforts to use insights from the philosophy of language to address problems of the nature of law.