Okay, so it's pretty apparent that I'm going to have to explain to you not only how language works, but also how the human mind works at some length.
Language doesn't form from thoughts, it forms from the desire for outward communication. If there were no need for outward communication among humans, then we wouldn't have a language, and we would think in terms of images rather than words. In other words, if you thought of a red cape you would think of the color red rather than the word red and the shape of the cape rather than the cape itself.
Interestingly enough, this is evidenced by a type of Autism. Autism effects the persons social and communication skills to the point where the person doesn't even try to learn any languages. A decent number of them never do, either. Instead, they sit in their "own little worlds" and do things such as play video games or draw. This proves that they do have the ability to think, as such tasks would be impossible without that ability, without having learned any forms of communication. There are quite a few people who have Autism who are pretty gifted when it comes to painting or drawing as well.
One of the reasons this may be is because they do not think with words like you and I do. They think with images. So when they think of a dog, their brain holds an image of the dog which they can then translate to the paper by drawing. When WE think of a dog, we think of the descriptive words for the dog and attempt to translate those to the paper using techniques for shaping.