I've recently been on a kind of a morphology seminar and was informed that it is not an uncommon phenomenon for languages to specifically mark subjects and objects which are not pronouns - an example being the Coptic language.
Unfortunately all of my internet queries upon this subject have been to no avail because I do not know the name of this phenomenon. Has anyone here ever heard of something like this and would they be able to put a name on it?
Some example sentences illustrating this kind of marking in Coptic:
eseqep-paibōk (FUT-she FUT-catch (-) NPOBJ-that-slave)
nerepaiqam napōt (COND-NPSUB-that-bull COND-run)
erepennēb nempefjaje ewem-phalēt (FUT-NPSUB-our-master and-his-enemy FUT-eat (-) NPOBJ-bird)
erepjaje ehotbs (FUT-NPSUB-enemy FUT-kill-she)
šarepairōme wōm (PRES-NPSUB-that-man eat)
nesnabel-pekqam (COND-she-COND-untie (-) NPOBJ-your-bull)
It was said that -rep- marks a non-pronoun subject (glossed NPSUB) and p- a non-pronoun object (glossed NPOBJ).