This is the 5853rd most frequent French word.
cristiana
"Cristiana" is not a French word; it is Italian or Spanish, meaning "Christian woman" in English.
Here, 'cristiana' is used as an adjective to describe the woman as Christian.
Elle est une femme cristiana qui croit en la bonté.
She is a cristiana woman who believes in goodness.
In this sentence, 'cristiana' refers to the population characterized by Christian beliefs, used adjectivally.
La population cristiana célèbre la fête de Noël en décembre.
The cristiana population celebrates Christmas in December.
'Cristiana' denotes the set of values associated with Christian heritage and culture.