acadia to cajun

And extremely short history of Cajun Louisiana: The Acadians were French Catholics living in eastern Canada when, in 1755, the British beat the French in the French and Indian War. The Acadians were deported and some came to Louisiana because, at that time, it belonged to France. The word Acadian changed, over time, to Cajun. Say Acadian fast a few times and you'll see.
This is the church written about in that sign above. It says it all.