Influential Catalan separatist leader Marta Rovira is back in Spain after more than six years in exile in Switzerland. The 47-year-old crossed the border between France and Catalonia in a car with four fellow campaigners. Shortly afterwards, she gave a combative speech in the border community of Cantallops: “We have come back to finish what we left unfinished,” she shouted to the cheers of many supporters. They carried a banner reading “Freedom for Catalonia.” Catalonia’s pro-independence movement reached a high point in late 2017 with an independence referendum, although it was later declared…