Allow address formats to specify whether the administrative area value is rendered instead of the code

Looks like the address output always uses the "ISO code" for the area where areas are specified for countries (the key of the PHP array, rather than the value).

While this works for some countries, where areas/states are usually abbreviated to a code, it doesn't work for many countries, especially where they "ISO codes" are numeric?

I wonder whether there should be an option for each country like "Use ISO code for area", which would give the current behaviour, while if that was false the "ISO codes" should be translated back to the corresponding area array value for output.

I've done a quick fix using hook_addressfield_administrative_areas_alter() in my own module.

It might be worth providing the flag the other way around: I think in general addresses will render the address using the administrative area name, rather than the ISO code. So a flag 'render_administrative_area_as_code' used for the few countries (e.g. USA) that would do this, and render all others as the visible string in the drop-down.

Just a though. My custom module code now fixes many countries to use the displayed string, rather than the "ISO code" for output.

That's surprising, although I suppose if the area code forms part of the postcode it makes sense. Ireland doesn't really have postcodes yet!

Thanks for the research, and the fix :)