Nintendo being Nintendo, they are not only a japanese company. They are a company from Kyoto. They probably still use fax machines in their offices and will stick with the old way until they are forced to do.
The original name of tintin itself does sound too foreign for me. I think they localised the names like Capcom style to make the characters name more universal.
The funny thing is of course, when I talk to my Dutch friends about tintin, it took me a while before they realize what I am talking...