Bonjour Je dois expliquer se qu'est le cosplay en anglais mais je ne le sais pas alors merci au personne qui donneron une reponse

It’s a Japanese practice of putting on a costume to look like a virtual characters, in particular manga or video games characters.

One of the aims of cosplay is to portray a character. You can do this 'accurately' by copying a character's exact look, down to the details. You can also put your own creative spin on it! Cosplayers achieve their looks through a mixture of costumes, wigs, accessories, and props.