Spanish-based discounter Dia has cut its sales forecast for 2011 due to troubles in the “complicated” French retail market, where its nine-month like-for-likes fell nearly 7%. In 2010, France accounted for nearly 27% of Dia’s sales worldwide. The retailer, which was spun off by Carrefour last July, said it now expects net sales in local currencies to rise by more than 3% for the year, down from its earlier forecast of more than 4%.