SCH abilities tend towards the more technical and yes, some of the japanese names especially so.
But in the end - even if you gloss over MP and such and being just a game system - SCH abilities are powered by Aetherflow (Not to mention the passive traits connected to the same). And for the most part, the lore team does fairly well at keeping lore explanations in line with how the game systems works.
So I would conclude that, yes, Scholars are most definitely using a branch of magic.
You can additionally conclude as much from the Arcanist questlines, if the above isn't compelling enough of an argument.
Edit: Just for fun, here's some dialogue from the scholar quests:
My archaeological pursuits are but an extension of this practice, for at present I am researching the military tactics of ancient Nym.
'Twould not surprise me if you were unfamiliar with Nym. The civilization flourished some fifteen-odd centuries ago, during the Fifth Astral Era.
The Nymians lived during an age of wonders, when the magical arts flourished. But magicks can be wielded for weal or for woe, and this period of peace eventually gave way to the great War of the Magi.
The nations of that bygone era brought earth-shattering magicks to bear against one another. Yet Nym, with only a handful of mages to support its army of mariners, repulsed would-be invaders time and time again.