To make it sound "fairy-like", you could use a combination of whimsical words and phrases. Here are a few ideas:
* "Je suis une fée française" - This translates to "I am a French fairy" in French, and could be a good starting point for a Fairy equivalent.
* "Fée du pays des fleurs" - This translates to "Fairy of the land of flowers", which evokes a sense of beauty and enchantment.
* "Lune d'argent, je suis une fée de France" - This translates to "Silver moon, I am a fairy of France", incorporating a poetic touch.
Ultimately, the best way to say "are a French fairy" in Fairy depends on the specific context and the overall tone you want to achieve.