there's a lot of reasons that it won't happen anytime soon. Those countries use euro as their main currency, also culturally and historically connected, which you can call them latins. Why don't you add Denmark to that group ? You can't because it will take ages :)
But for similar application, you could use MobilePay (Vipps?). That works across Finland, Sweden, Norway and Denmark.
So although only Finland uses Euro (and rest have their own currency), you can easily transfer money between persons using just their mobile number as an example.
