Je suis en Jamaïquewe use "en with Feminine island in French but we would say:
Je suis à Cuba (Cuba is masculine)
Jamaique
jamaïcaine
curieux, or for the feminine version, curieuse
Une américaine
Names aren't translated, they stay the same wherever they go. However, the French version of Benjamin includes a feminine Benjamine, and the French name Benoit is analogous to Benedict.
Veins are "(les) veines" (feminine) in French.
interactif masculineinteractive feminine
"excellent", (or excellente if feminine)
Old in French is vieux (masculine) or vieille (feminine).
Proof is translated "preuve" (feminine noun) in French.
Un or une (masculine and feminine).
voluptueux (masculine)voluptueuse (feminine)
masculine for my=mon feminine for my=ma me=moi
la Namibie (feminine noun)