​You are using language right now. Not just to read these words - to think. The sentence you just processed became a thought before you consciously decided what to do with it. Language is so close to thinking that it is difficult to see where one ends and the other begins. That difficulty is exactly what makes it interesting for TOK. The Language optional theme does not treat language as a neutral tool that carries knowledge from one person to another, like water through a pipe. Language shapes what can be known, who gets to know it, and what happens when someone uses it in a particular way at a particular moment.

​The four pages of this theme take language apart along the four axes of the TOK framework. Each page builds on the last, and each ends by handing something to the next. By the time you reach Ethics, you will be asking questions about naming and power that only make sense because of what Scope, Perspectives, and Methods established first.