Humans think in language. Many humans can think in many languages. The phenomenon is known as narratization, and it is uniquely human. Other creatures do not think in language. They think in feelings and instincts. Humans need to be able to think in language in order to talk in language. When we speak, our thoughts and vocalizations are in sync. Our brains are wired that way, and we accomplish it naturally without thinking about it (we tend to have problems talking when we do think about it).