Great! I was thinking that attaching a language label to the whole URI (URI label + link) and not just to the URI label would actually give more flexibility.
Another related idea and again I have no idea if this is feasible or not:
would it be possible to enter in a csv file both an URI and its label in two different columns?
At the moment, I can import the column containing the links as URI but cannot import the column containing the labels, right?