It is doubtful whether he could have bought a drink or asked the way to the Kursaal in either language, but he understood the universal Hellenistic scientific jargon, and he pawed through the heavy books, rubbing his eyes, which were filled with salty fire.
There are no more uses of "jargon" in the book.
Show samples from other sources
I’ve been home since Saturday now, and since Saturday I’ve heard a great deal of talk about mongrelizin’ the race, and it’s led me to wonder if that’s not rather an unfortunate phrase, and if probably it should be discarded from Southern jargon these days.
Harper Lee -- Go Set a Watchman
(absolument) in the sense of ’absolutely,’ expressed himself, in fact, in that Great Russo-French jargon which the French ridicule so when they have no reason for assuring us that we speak French like angels, (comme des anges.’