Hi,
The default language translation will probably be modified to just “Country” as that type of custom field prints a list of the ISO 3166 country codes. “State” is more appropriate to specify a region or an actual state, where this applies (i.e. US, Canada, Australia).
You did good by changing the default translation for that string in the PO/MO file, but please notice that the Pro version of the plugin would have let you modify directly the label of that custom field from the apposite page “Global – Custom Fields”. Such labels also support translations into other languages in case you need to set up a multi-language website. This is valid for the country and postal code fields.
Adding new custom fields is not allowed with the free version of the plugin, I’m sorry. I believe to have understood you would like to offer also a Country-State input field? In this case this wouldn’t be a drop down list automatically populated with the states of the selected country as there is no custom field of type “country-state”, you can only have the countries populated through the database. If you wanted to display a “country-state” field, then this would have to be either an input field of type text for manual input, or a fixed drop down menu with a few options.
We hope this helps!
The VikWP Team