Nice little reference to a Guard regiment from Gudrun (from Eisenhorn) and their "soldiers' argot" in Kill Team: Terror on Devlan

Those of you who have read the Eisenhorn series will be aware of Gudrun, and the Guard regiment the Gudrunite 50th Rifles, who appear in Xenos and Hereticus.

Gudrun and its Guard regiments have actually been mentioned in a few places recently, regarding their efforts to repel Chaos invasions in the aftermath of Cadia's fall.

But two soldiers from another Gudrunite regiment, the 990th, also appear in Kill Team: Terror on Devlan.

They ended up on Devlan on the Eastern Fringe of the Imperium, far, far away from their homeworld in the Scarus Sector in Segmentum Obscurus. And they were folded into a regiment also from Obscurus, the Cadian 82nd Heavy Infantry, where they served in the elite Spectre Team. We are told:

Spectres Mattias Arvan & Kas Dekler (Orig: Gudrunite 990^(th))

“Rare to see two soldiers with such long shared history. These two got thrown together as Heavy Gunner and Loader back with the Gudrunite 990^(th). They were the only two from their entire company to limp out of the siege of Thatesh alive, and with a collection of Ork-tooth trophies fine enough to make a Catachan envious. As to that business on Unheimlecht III, not sure I’m even allowed to [REDACTED].”

Kill Team: Terror on Devlan Dossier (2025), p. 15.

(Unheimlecht is just German for "uncanny"? There might be a reference I am failing to appreciate here!)

But we also get a nice little detail about them, as their Spectre team journeys by Valkyrie to try and track down and kill the Red Terror which has been terrorizing Devlan. The team's guide, Echter, observes them:

Seated next to Dekler, with his attention focused on a much-thumbed chapbook of Imperial prayers, Matias Arvan grumbles something inaudible. Echter knows that, even had he caught them, he wouldn’t have understood the words. Arvan largely sticks to the soldiers’ argot of the Gundrunite Rifles, the regiment from where he and Dekler were first recruited.

Kill Team: Terror on Devlan Dossier (2025), p. 15.

The topic of different languages in the Imperium sometimes arises, and this is a nice example of how there can be many different local languages and dialects. In this case, presumably a form of military slang specific to regiments from Gudrun. And one far-enough removed from more common forms of Low Gothic that a Cadian feels they would be unable to understand it.

I also like that we see a Guardsman being pious and reading his well-used prayerbook. The way religous belief shapes the views and actions of those on Devlan is a recurring them in the Dossier, including the fact that being given "additional supporting prayers" is a seen as a key strategic consideration: https://www.reddit.com/r/40kLore/comments/1tu7hdi/nice_little_detail_in_kill_team_terror_on_devlan/

Anyway, I just thought this was a neat little bit of worldbuilding, so thought I'd share!