PARIS—France’s government said on Tuesday it may refer Russia to the World Trade Organisation (WTO) over Moscow’s plans to force champagne producers to add the designation “sparkling wine” to their products sold in Russia. Moscow has adopted legislation requiring the “sparkling wine” label be added to bottles of foreign fizz, while Russian producers of the local version, “shampanskoye,” do not have to add the label. Some French producers—who assert that only products from France’s Champagne region should sold as champagne—interpreted the legislation as an effort to benefit Russian winemakers at their expense. “Once we have considered [the Russian legislation], we will act in the coming days in respect of the Russian authorities,” French Foreign Minister Jean-Yves Le Drian said during a session of parliament. “If by chance there are proven violations of the rules of the World Trade Organisation, we will seek recourse in the way we have previously envisaged …