Is Vietnam spelt like this?
Google says no but Monzo says yes…
According to ISO-3166 yes it is. (I didn’t know this either!)
But Wiki?
Western version is to join them together
Government says one word:
https://www.registers.service.gov.uk/registers/country?utf8=✓&q=Viet&status=current#records_wrapper
It’s nice and easy to pull a github repo which contains all the ISO country codes and names and just use that which is probably what’s happened here. Dare say if it was a big issue they could fork it and change the name as long as the ISO codes are maintained.