I have installed this plugin but now I have this warning message : You didn't setup any blog relationships! You have to setup them first to use Multilingual Press. For this, go to Network » Sites » and choose a blog to edit. Then go to the tab "Multilingiual Press" and set up the relationships.
I don't know how to do that. I also add new website thinking that I could have created a relationship between the "current" website and the new one but It didn't.
I think I'm doing wrong. I have a website and I want it to be translated.
Thanks for your help.