We use words such as art, establish, genre, liberty and perfect every day without realizing they derive from French.
1. Avant-garde— radically innovative or cutting-edge movements in art, music, or literature; a person or group of people who invent or promote new techniques, especially in the arts.
JRR Tolkien was an avant-garde figure in the genre of fantasy.
2. Belles-lettres —literary works that are valued for their aesthetic qualities, rather than their informative or educational content; light, stylish writings; literature regarded as a form of fine art; literally “fine letters.”
I’ve savored the belles-lettres of Patrick O’Brian five times.