When I became proficient in my third language (over 20 years ago) and had to listen, speak, read, and write in all three languages on a regular basis, my mind adapted to thinking in concepts, and lazily evaluating the concepts to the words in the needed language, as the situation required.
A few years afterward, I was discussing this with a co-worker. He had a really hard time fathoming this. He asked me an excellent and hilarious question: "When you call yourself an idiot because of something stupid you did, what language do you use?" After having a good laugh, I thought about it seriously and realized that I don't criticize myself. Instead, I internally model someone who would be likely to criticize me and hear their voice in the language they would normally speak. For example, it might be my parents scolding in my primary language, or a teacher criticizing me in English. We discussed this and he agreed he does the same thing.
So, I suspect that many of us have only an internal monologue, but a whole internal society with various conversations going on.
A few years afterward, I was discussing this with a co-worker. He had a really hard time fathoming this. He asked me an excellent and hilarious question: "When you call yourself an idiot because of something stupid you did, what language do you use?" After having a good laugh, I thought about it seriously and realized that I don't criticize myself. Instead, I internally model someone who would be likely to criticize me and hear their voice in the language they would normally speak. For example, it might be my parents scolding in my primary language, or a teacher criticizing me in English. We discussed this and he agreed he does the same thing.
So, I suspect that many of us have only an internal monologue, but a whole internal society with various conversations going on.