Contrex - your observation is very interesting to me as I work with several computer languages (and designed a number of AI programs in the past) because our languages convey so much more than we can explain to machines.
Just think of terms referring to colors, for instance. Think of the expression "she's in the pink": inexplicable to a computer other than in its non-literal sense; of course the color pink is easy to explain (just give the range in Angstrom), as is the color black, but "a black mood came over him" is only clear to us, not to machines...
Btw, is your background in linguistics? Mine isn't, I only came across the field in relation to computer applications.