fictional, fictitious, made-up
Por esta enfermedad ficticia, Amélie no va a la escuela.
Because of this fictional illness, Amélie does not go to school.
— Amélie (2001)
La historia que voy a contar es completamente ficticia.
The story I am about to tell is entirely fictional.
Es una novela, nada más que una historia ficticia.
It's a novel, nothing more than a fictional story.
— La grande bellezza (2013)