Multisite shared cart /checkout
I'm planning on building a multisite Drupal Commerce installation. in the beginning it will consist on of three different commerces as follows:
commerce1.com (will be in 4 different languages)
commerce2.com (in two languages)
commerce3.com (in one language)
Is it possible to share the cart and checkout of these three commerces? So that a customer can add to his cart for example one item from commerce1.com and another from commerce2.com and then via single checkout pay his order.
I found this module called Domain Access, but will it support all the different language versions I'll be running?
I found a tutorial for sharing the user information between multisite sites, but I haven't found anything on sharing cart / checkout.