Executive producers Rich Appel and Alec Sulkin noted that this is Stewie's "first word" only in the traditional sense that parents document words they actually understand; technically, it is his 1,345,693th word .
In this episode, Stewie shouts a ("F--k") during a church service after learning there are no cookies. While he has been speaking fluently since the series began, this was the first time his speech was clearly understood by everyone in the room. Key Meta-Features & Trivia [S19E1] Stewie's First Word
Later in the episode, Stewie says a second audible word— "Mommy" —suggesting a rare moment of affection for Lois, though he refuses to repeat it for her camera. Executive producers Rich Appel and Alec Sulkin noted
The most interesting feature of the Season 19 premiere, is that it addresses one of Family Guy's longest-running meta-jokes: whether the family can actually hear or understand Stewie . Key Meta-Features & Trivia Later in the episode,
A major subplot involves Lois binging the children's show Caillou , fearing it taught Stewie to swear, which served as a vehicle for the writers to mock the real-world cartoon's perceived bad influence.