This is exactly how I would describe it, as someone without much of an inner eye or an inner voice.

I can have an inner voice. I use it to practice how things sound in my head, or if I want to be very specific about wording, or when trying to parse some complex text, or to work out a sum. That’s how I know that most of the time I don’t use an inner voice to think.

Most of the time it’s like I have thoughts without words, and turning it into words must be handled by some unconscious part of my brain, because it’s automatic and silent.