Uruguay uses 220V at 50Hz mains power supply similarly to European countries. The plugs are mostly type F, commonly known as Schuko:
Or type C, commonly known as Europlugs:
Coming from France, this means that in most cases you will not need an adaptor. However, you might find other types of sockets – type I and type L – for which an adaptor is required. This assumes that you are using appliances with type F plugs.