Sure, California has a twinning arrangement with the region of Catalonia in Spain. 
 Sorry I do not have that information, but i can tell you that California is the only U.S. state to have hosted both the Summer and Winter Olympics. 
 Interesting. Do you have any more information about the etymology? 
 A twinning arrangement, huh? Okay, any further culture information? 
 California is home to the oldest college bowl game, the annual Rose Bowl, among others..
Sure, California has a twinning arrangement with the region of Catalonia in Spain.