Uruks

[ISENGAR]

Et si on notait les versions originales de ces allusions aux "trolls des montagnes" ?

"Great beasts drew it, Orcs surrounded it, and behind walked mountain-trolls to wield it" pour la première

mais "a great company of hill-trolls out of Gorgoroth" pour la seconde.

Du coup, il ya effectivement une allusion explicite aux trolls des montagnes qui m'avait échapée. Mea culpa... C'est bien urbain de me l'avoir rappelée
Toutefois, ça ne m'explique pas le lien entre "trolls des montagnes" et olog-hai...

A l'appendice F, on peut juste lire à propos des Olog-hai:

But at the end of the Third Age a troll-race not before seen appeared in southern Mirkwood and in the mountain borders of Mordor. Olog-hai they were called in the Black Speech. That Sauron bred them none doubted, though from what stock was not known. Some held that they were not Trolls but giant Orcs

I.