- Beam Me Up, Scotty!: The phrase "direct rule from London" never actually shows up in-game. The closest line to it is "Ireland must be directly ruled from London!".
- Development Gag: Freikorps Officer Himmler talking about him wanting to "build himself a chicken farm" in the Baltics is a reference to early lore when Himmler was an actual chicken farmer in the Baltics.
- Fan Nickname:
- The Corn Lord for Nikita Khrushchev, a potential leader of Socialist Ukraine in-game, for his infamous real life campaign to cultivate corn in the Soviet Union.
- The American Augustus for Dwight D. Eisenhower, if he becomes a successor to MacArthur, who is known as the American Caesar.
- Battle Pope for the NatPop Pope candidate Julius IV (originally Theodore Innitzer, later replaced by Alfredo Schuster in the Garibaldi's Nightmare update), for his hardline militarist stand against syndicalism and as a reference to the comic book series Battle Pope.
- Italianization is used instead of balkanization because of the extreme division of what once was Italy, now divided between the Republic of Italy, Socialist Republic of Italy, Two Sicilies, Papal States and Sardinia.
- Mittelafrika Explosion for the collapse of Deutsch-Mittelafrika, due to its suddenness and the extreme amount of states created in its aftermath.
- Meme Acknowledgment:
- "Direct rule from London" is referenced in the one of the loading screen tips in HoI IV. Also, one of the focuses for Totalist Chile is named "Direct rule from Santiago".
- One of the loading bar labels is "Hiding Trotsky"
- Also, "Soviet Anime", specifically in the Patch Notes for the hotfix that removed the references to foreign animators, which mentions it as "Soviet anime studios are no longer a thing, this upsets us as well".
- "Leon Degrelle constantly shouting" is stealthily acknowledged in the mod's files: His leader portrait's filename has his name in all-caps, when all the other leader's have normal capitalization.
Trivia / Kaiserreich: Legacy of the Weltkrieg