Language
Language includes one use of "f--k," plus "s--t," "ass" "a--hole," "goddamn," "son of a bitch." Also British swearing like "bugger" and "bloody." Japanese people are frequently referred to as "Japs," and a serviceman leading an exercise session calls his charges (all male) "ladies," implying they're weak.
Whenever I reference something about WW II I use the term “Japs”. A modern reference to them I use Japanese.
e.g. “It is amazing to me how we fought to death with the Japs, and now the Japanese our among our best of allies.”