Research in cognitive science and linguistics has suggested to us that the answer to this question really involves disentangling thought from internal monologue. Many linguists and cognitive scientists have argued that they are not the same thing and that thought is not subject to simple introspection.
Consider, for example, these similar questions:
- What is the language of your vision?
- What is the language of smell?
Or these questions:
- What is the language of thought of pre-lingual babies?
- What is the language of thought of that word or person’s name you know but can’t remember how to say?