As a linguist, you do not need to know or learn many languages; rather you learn about language. Linguistics is the scientific study of human language, its structure, its history, its acquisition and its use in communication.
Theoretical linguists study commonalities and differences between languages and they develop descriptions of the structure of individual languages, e.g. English. The study of theoretical linguistics breaks down into the following areas:
In addition, there are many areas of linguistics that deal with development and use of language. For instance, linguists study how languages are acquired, how they change over time, and how they are used in real-time production and comprehension or among different social or ethnic groups of speakers. These questions are addressed in the following areas of linguistics:
Linguistics intersects with many other disciplines in the humanities, the social and the natural sciences that study particular aspects of language, for instance, Philosophy, Psychology, Literature, Language Teaching and Pedagogy, Sociology, Biology, Computer Science, and the Health Sciences.
By studying linguistics, you discover intriguing facts about language which will be useful for language learning, language teaching and communication. Plus, linguistics is fun!