Antiquated Linguistics: For a very long time, from its creation in 1955 until 1989, the characters all spoke the Flemish dialect. And this while other comics already spoke the Dutch standard language since the 1960s.
Asian Speekee Engrish: Or Dutch for that matter. Asians in this comic strip all have trouble pronouncing the letter "r".
Babies Make Everything Better: Jommeke and Flip discover a baby in Het Hemelhuis and decide to take care of him with the aid of Annemieke and Rozemieke.
Christianity Is Catholic: Jef Nys was a pious Catholic and Jommeke was published in Catholic magazines and newspapers. So naturally a lot of Catholic imagery is referenced and seen. [[Justified since in the Flanders of the Fifties until well into the Seventies, everybody was Catholic.
Just Woke Up That Way: In a few albums professor Gobelijn accidentally puts something in the water or the air that transforms everybody in Zonnedorp (or sometimes the entire world) into a strange mutation, shape or different way of thinking.
In Kinderen Baas all the children become as smart as adults and the adults start acting like children.
In De Lustige Slurfers everybody gets an elephant's trunk.
In Het Staartendorp everybody grows an animal's tail.
In De Luchtzwemmers everybody floats up into the air and is able to fly.
In Neuzen bij de Vleet everybody's nose grows large.
In De Vruchtenmakers everybody grows a tree on their head.
In De Samsons everybody's hair grows and they become super strong.
In De Grote Knoeiboel everybody becomes a weird shaped character.
Kids Shouldn't Watch Horror Films: In the album De Vampier van Drakenburg Filiberke watches a vampire movie while being home alone at night. He is so scared that he actually goes to Jommeke's home to stay over for the night.
Madam Pepermunt, who shoots peppermints instead of bullets, hence her nickname.
Boemel, a tramp who always carries a bottle in his back pocket (boemelen is Flemish for drinking large quantities of alcohol)
Choco the chimpansee is named that way, because he likes to eat chocolate paste.
Mind-Control Device: The Koningin van Onderland hypnotizes a police man in De Koningin van Onderland so he can kidnap children to her castle.
Moses in the Bullrushes: In Het Hemelhuis a little baby is found floating by in a basket of reeds. Jommeke even says it's like the story of Moses. They adopt the kid until his real parents come to take him with them.
The Movie: In 1965 a very low-budget live-action film was made, De Schat van de Zeerover: It wasn't a success and is almost forgotten today.
Name and Name: Kwak and Boemel, Annemieke and Rozemieke, Jommeke and Filiberke, Mic Mac Jampudding and Arabella.
Narrating the Obvious: Since this is a comic strip aimed at children a lot of things are explained in this way.
Shaggy Dog Story: In Wie Zoekt Die Vindt, Jommeke and his friends travel to several places on Earth to search for a treasure, only to find out that it is buried in their own village, where it all turns out to be a simple All for Nothing joke.