i don`t think language is an os for the mind. by intraception i perceive my thoughts as concepts first, then i look for their names, the term. sometime i have the feeling of the abstract notion, i feel my spirit wandering in some dark valley searching for enlightement - and then, suddently i get over the word, which gives me power of the idea to handle it at my will.
btw- animals are thinking too, without structured language.
language is imho not an os, but just a story-teller. we are telling us many fairy tales about god and the world, and ourselves and the others of course. but it is not in that way the mind works.
the mind works silently like a thief in the night, and he is smart enough to deflect our attention by telling us little stories, like a father tells his child a good night story to keep him asleep. that is the use and the worth of languages.