Soldato
Apparently if you use this link you can change your throwaway account to a EU account. Reports on the hotdeals page is that after install anyway it connects to EU servers and is in English.
https://eu.battle.net/support/en/help/product/services/316/638/solution
I can confirm that once I got rid of the VPN and installed MW and launched it, it was in English and connects to EU servers. Pretty flawless if you ask me. So no real need to change to an EU account. But it might different for others.