This is the 2518th most frequent French word.
breton
"Breton" refers to something or someone related to Brittany, a region in France, or the Celtic language spoken there.
In this sentence, 'bretonnes' (feminine plural of 'breton') is used as an adjective to describe the kind of crepes, meaning they are from Brittany.
J'aime les crêpes bretonnes.
I love Breton crepes.
Here, 'breton' refers to the Breton language spoken in Brittany, serving as a noun.
Le breton est une langue celtique.
Breton is a Celtic language.
In this sentence, 'Breton' is used as a noun to identify Pierre as a person from Brittany.