Error 'Country is invalid'

[rvdsteege]

ICEPAY requires a country when starting a payment. We currently determine the country in the following way:

1. billing address country
2. logged in user: language setting from user profile
3. browser language setting (Accept-Language header) if it contains the 'country part' (e.g. US for en-US, but ignoring nl)
4. site language from general settings

With for example our built-in forms, a user that is not logged-in and uses en-US as browser language and using site language nl_NL will not be able to pay because of an error:

Country is invalid

Can we improve upon this?

Suggestion from customer:

Of een extra feature in de plugin zelf om de country code met de hand te zetten op de site taal te overriden?

Internal Help Scout ticket: https://secure.helpscout.net/conversation/2138120837/25131

This issue could possibly be resolved with #1.