[Gothmog]

I guess the quote comes from the movie, not the book? I can't say that I remember it. But speaking of language and leeches, the leech used in medicine (in swedish called "blood-leech") is named Hirudo medicinalis in latin, a proof of its use to cure.

Nowadays, it's use in medicine is mainly in surgery, to improve a venous conguestion when a transplant is performed for example.

That was some unuseful facts. If the question was "Are there no leeches among you?", it seems as if it was the doctors the soldier was asking for. I can't imagine that there were any worms in the armies of Men!