PARIS, April 8 (Reuters) - French Finance Minister Bruno Le Maire welcomed on Thursday the latest U.S. proposals to unblock international negotiations on taxing cross-border commerce, which he said were a good starting point. Speaking to reporters, Le Maire also said that he was open to global minimum corporate tax rate above the 12.5% under disucssion so far in the negotiations after Washington proposed a rate of 21%. (Reporting by Leigh Thomas; Editing by Andrew Cawthorne)