Even though your browser locale is Italiano, the language in which the address displays is depend on the location you select. If you pin some location in Spain, the language in which the address will be displayed is Spanish, like wise if you pin some location in France, the language of the address would be in French, so on. I believe there is no need of translations in displaying the address. Because I believe the address are fed in google map in respective local language.
Please play around with this and let me know if this helps.
I think the translation is irrelevant in this case, please correct me if I am wrong.
May be you can try parsing the address and display these below caption in localized language
Flat # (Localize this caption) : Display the value