cinquième roue du carrosse betyder på engelska

third wheel▼◼◼◼(unwanted third party accompanying two people on a date)
noun
[UK: ˈθɜːd ˈwiːl̩] [US: ˈθɝːd ˈhwiːl̩]

fifth wheel▼◼◼◼(anything superfluous or unnecessary)
noun
[UK: ˈfɪfθ ˈwiːl̩] [US: ˈfɪfθ ˈhwiːl̩]