The world of the Fifth Element is inspired from the comic Valerian, said Luc Besson.

The designs in Starwars are inspired from the comic Valerian. Georges Lucas never said it was inspired from Valerian, but you can compare : https://blog.chordian.net/2016/01/24/how-a-french-comic-series-inspired-star-wars/

Years later, Luc Besson made an adaptation of the comic Valerian. People criticized that it was plagiarism of Starwars.

If you want to get more of the Fith Element and Valérian - the movie, you could check Valérian - the comic books.

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