This is the 6867th most frequent French word.
limbourgeois
"Limbourgeois" refers to something or someone from Limburg, a region in Belgium or the Netherlands, or the Limburgish language spoken there.
In this sentence, 'limbourgeois' is used as a noun to refer to the Limburgish language spoken by people in the Limburg region.
Les habitants de la région parlent le limbourgeois.
The inhabitants of the region speak Limburgish.
Here, 'limbourgeois' is again used as a noun to describe songs performed in the Limburgish language.
Elle adore écouter des chansons en limbourgeois.
She loves listening to songs in Limburgish.
In this context, 'limbourgeois' is used as an adjective to describe accents that originate from the Limburg region.