Sandy Petersen:
Sandy had some interesting ideas about Troll communicating things we
humans communicate by body language by variations in their voices.
Thus, humans are "inscrutable" to Trolls - and a Human learning
Darktongue would to a Troll be the same as an alien who spoke a human
tongue without showing any feelings on his face, but whose voice vibrated strangely, went up and down as if
drunk, and sometimes disappeared entirely (human faces must be
unbearably plastic to a troll).
Scary, eh?
Erik Sieurin