franc: a basic unit of currency in Belgium, Benin, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Comoros, Congo, Djibouti, France, Gabon, Ivory Coast, Liechtenstein, Luxembourg, Madagascar, Mali, Monaco, Niger, Rwanda, Senegal, Switzerland, and Togo.法郎：比利时、贝宁、布基纳法索、布隆迪、喀麦隆、中非共和国、乍得、科摩罗、刚果、吉布提、法国、加蓬、科特迪卡、列支敦士登、卢森堡、马达加斯加、马里、摩纳哥、尼日尔、卢旺达、塞内加尔、瑞士和多哥等国家的基本货币单位。