"Riche" in French is a masculine adjective. The feminine form of "riche" is "riche" when used as an adjective.
Riche
"Espagne" is feminine in French.
"L'Autriche" is feminine in French.
The word "lentille" is a feminine noun in French.
In French, "rose" is a feminine noun.
Riche is an adjective written the same in both masculine and feminine, but that may takes a plural mark (des gens riches > rich people) and thus is not considered invariable.
"She isn't rich!" is an English equivalent of the French phrase Elle n'est pas riche! The feminine singular statement also translates as "She is not rich!" in English. The pronunciation will be "el ney pa reesh" in French.
"je suis riche"
Nouveau riche is French for "new rich".
riche
riche
Riche
rich
ville riche
elle est riche
I translated it into french and found: Il est riche.
A wealthy woman is 'une femme riche' in French.