As I see it most complex thinking is done with one language or another. Then there are the things that have no language to them. I like to try and go through a day without much language. This very rarely happens. :)

It's a really good way to test your mental reflexes. For awhile when I was around 14 I would try to get at least my mornings going without language, that is to say, verbal thinking. I would get up get dressed and go outside and go for a walk. Not once did I think anything to myself. I just did things, walked, climbed, played in the water. No stopping to overthink things. I miss that.

Now everything I do is thought about in my damned infernal contraption of a mind in english. I do math problems and visualize them, I hate that. I like to just look at numbers and know what they are added up without thinking about it too hard. 10+23+80+320+3+233=?. When I can look at those and get the total in 2 or 3 seconds then i'm doing good. Not so much thinking as a reaction to an obstacle. Like walking through trees, tree in your way, go around. Don't think, which way should I go or that way looks easier.
Just go!