In some languages, "5" creates an anonymous constant object of type Number. Some languages will quietly coerce larger structures to any object it resembles with late binding (?) and lazy evaluation.

Natural Language is only as unstructured as their speakers. Going by that measure, a lot of programs are unstructured, although the languages they are written in are not.

A more interesting notion, that I don't really understand either, is that language is necessarily underspecified.