Possible Mis-labeled Goblin Magitek Model
Similar models of Illuminati magitek are given the same "G" model number even when they look or behave slightly different. For instance, regardless of whether it's an enemy, a mount, or a minion, the crab-like Gobwalkers are G-VII.
In the case of the Gobmachine/Gobtank, however, one is G-IV and one is G-VI. Curiously, the G-VI appeared first, alongside the first appearance of the Vangob G-III, only to later have a similar model called the IV.
One of these might be backwards. I stress might, because, for all I know, what's under the hood is different and the numbers are intentional. Oddly, however, in the case of Gobmachine G-VI, all of the languages agree, while with King Gobtank G-IV, German stands alone in changing the IV to a VI, the opposite of what I suspected.
I dunno. Something seems amiss so here I am.