Finally, real english is back on the menu.
All those pretentious mofos who defended the last chapter's translations can go suck it!
It's still a bit more wonky than normal in places, but it is much better than last chapter. I think the biggest problem is that everyone basically "sounds" the same. It's most noticeable with Übel.
As for the Empire, with all the German references throughout the series, I figured things might get a bit more "mid-century" at some point, and this nebulous "Empire" felt like the likely culprit. But I didn't expect them to go full "SS with Potter wands"... The author might as well have dug up Hugo Boss and had him do the character design...
As for their reasoning behind whacking Serie and Frieren (and who knows how many other powerful mages), power is more than enough reason. The Empire, thanks to Flamme, was the nation that brought mainstream magic use to the continent, back when they ran most of it and their only real competition was the demons. Now they control merely a fraction of their old area—what could arguably be called the "ass end" of it, at that—and the demons are few and far between, with the widely accepted most powerful of their number just recently being done in. The only thing really standing between them and a return to continental dominance is Serie, her organization, and any other powerful mages in the south.
Countries expand. That is the nature of things. It's abnormal when they don't. If it weren't for Himmel and the Hero's Party surviving their trip back to the Holy City of Strahl and serving as a beacon of peace for the next 50+ years, the Empire probably would have been ramping up hostilities far sooner. Frankly I'm surprised something like this Serie assassination plot hasn't come up before. Maybe it has, just long enough ago (and/or far enough removed from Frieren) that we haven't heard about it.
And don't be so quick to write Serie off. She's nowhere near the Obi-Wan/Yoda mentor role that tends to be killed off in these types of stories, and Frieren is hardly your typical "hero's journey" protagonist. It's entirely possible she won't survive to the end of the series, but I wager she's got more to fear from among her First Class mages than she does from "Natsy Hogwarts".