Are there Simpsons episodes with no bad language?
I can't think of one single episode that contains any beeped swearing and the only swear words I can think of offhand are fairly tame, Dammit, Damn or Hell for example. Bastard was used once but in the correct usage.
I can recall the word "masturbate" being beeped which is odd because they've said the word before uncensored.
There are zero unaired episodes of The Simpsons. I suppose technically the newest season 29, which debuted on October 01st 2017, is filled with 'unaired' episodes but naturally there is a distinct difference in episodes that were supposed to air & didn't and completed episodes that haven't been scheduled to air.
Technically Zero. While the first episode was alternately called The Simpsons Christmas Special it is simply the first episode, it is not a separate special created for the Simpsons. As of the 25th Season, there has been 12 Christmas themed episodes, but those are also just regular episodes, not specials.