Wait a minute.

If a work esists in, say, ru.wikisource,

And then someone translates that work and posts his translation under a free license in he.wikisource,

I am not to link the hebrew version to its source in ru.ws on wikidata,

But to create a seperate wikidata entry for it?

This makes zero sense to me, and we never did it this way on he.wikisource.