Distinguishing internal speech from other types of speech

The Shaykh : It is known, and praise be to Allah, from the writings of the people of the Sunnah. Internal speech is not called "speech" linguistically. If I form a subject, a statement, an idea, or something similar in my mind, it is not linguistically called "speech" regarding this. Rather, it is said that such-and-such occurred in his mind. This is the first point.
Second: Internal speech is not heard, and the Divine speech