In English the Dutch will say things like: “Cyclists in the Netherlands do not wear special clothes for cycling” (because in their minds only ‘racers’ do that). And “No cyclist in the Netherlands wears a helmet” (since only sports cyclists do). Forgetting that in English cyclist is a more generic term than fietser in Dutch is.
good un-confusing article explaining the difference in meanings of “cyclist” and “fietser” in english and dutch. bicycledutch, 28.05.12.