I actually played the Japanese version of Magic Knight Rayearth about a month ago. I'm stating the obvious, I'm sure, but not only was that stuff not in there; there was nothing remotely approaching that tone at all in the whole game. That's what really bothers me about those jokes.
I have to admit, when the village guards in Popful Mail talked like the cops in Dragnet, it made me laugh. But as a whole, Popful Mail has that sort of goofy tone in the original, too, and I think Working Designs captured that goofiness very well. There are some jokes that you would think weren't in the original that actually were, too.
Also, I've been working on Anearth Fantasy Stories a lot recently, and I totally get how mundane some of the routine NPC townspeople lines can get in an RPG. In a typical town-dungeon game, basically everyone in a town gives a one-sentence complaint about what the monster in the next dungeon is doing to screw everything up. There's a lot of temptation to rephrase things, and it's a small step from there to embellishing and just writing whatever.