Linguistics is the scientific study of language. Its primary goal is to learn about the 'natural' language that humans use every day and how it works. Linguists ask such fundamental questions as: What aspects of language are universal for all humans? How can we account for the remarkable grammatical similarities between languages as apparently diverse as English, Japanese and Arabic? What are the rules of grammar that we language users employ, and how do we come to 'know' them? To what extent is the structure of language related to how we think about the world around us? A linguist, then, here refers to a linguistics expert who seeks to answer such questions, rather than someone who is multilingual.