Can you think without words? Can you imagine how it feels to swim, something you might have done, and extend it to fly like a bird? Can you read a novel and feel emotions about characters that don't exist beyond text descriptions of their actions? Language is a way to encode thought. It's not what thoughts are made of.
Are images and words the only way to think? Are these boundaries even fundamental or are they arbitrary? How does a blind deaf person think? Do you ever think in terms of sensations or movements? Can you remember a roller coaster ride, a car trip? Can you think of a taste?
I find hard to conceive of people who can think only in terms of language.
