There is a weird translation in Thunar for "Delete" in French. It's translated as "Effacer", but it's not clear, beacause on the xfce desktop, it's translated as "Supprimer". I think it should be changed by "Supprimer".
Reassigning as this is about a translation in thunar, not one of its plugins.
This is "Supprimer" since ages. If you want to participate to translations, see https://docs.xfce.org/contribute/translate/start