"Akuma" means 'demon' in Japanese.
This show debuted in France, then South Korea before premiering in the US.
Ladybug and Cat Noir both attend a secondary school ("college" in French) called "Collège Françoise Dupont". "Françoise Dupont" is the civilian identity of Fantômette, a French super-heroine character introduced in 1961. Fantômette was the first female superhero in French literature.
Miraculous: Tales of Ladybug & Cat Noir was pitched as an anime styled show, targeted towards teens & young adults, with a darker plot-line. This didn't work, so it was switched from 2D to 3D, with a slightly younger demographic in mind.
In countries outside Europe and the US (such as Korea), the show is known as "Miraculous Ladybug". In European countries and the US, the show is known as "Miraculous: Tales of Ladybug and Cat Noir" or "Miraculous" for short. The name change was because the show wanted to appeal to girls and boys, and to show that Cat Noir is as much a main character as Ladybug.