In "Green Streets" Cricket drops the word "scumbag"
More frequent language is very mild and filled with euphemisms ("dang", "heck", "gosh"...).
We hear "darn" and "shut up" a few times.
Name-calling words and phrases like: Stupid, Idiot, Scumbag, Loser, Dummy, Blort, Evil Puppet, Dingbat, etc.
A cat that the Greens own is named "Dirtbag".
In the episode "Bleeped", the word "Blort" is referred to as a curse word in big city. Played for laughs.
In "Garage Tales" Alice says "See ya sucker!" to Ernest.
In the episode "Uncaged", a character says: "You can take our differences and shove 'em up your...!" but she's cut short.
Bill said, "That's bloody hot now," when he incorrectly fixed an oven in "The Move." "Bloody" is only a swear in the UK.