nationality
When you make a new reservation and add details such as name, email etc. In the first window make it mandatory to choose nationality aswell.
ge the system to recognise country codes in phone numbers in reservations and add nationality autoamtically. For example +46 for sweden.
the possibility to edit multiple profiles at the same time to add nationality

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NaN commented
In the first field when you make a new customer profile, to be able to add nationality at the same time. We need it for statistics.
And if the system can recognise phone number with country codes and add that nationality automatically. For example +46 for sweden
Change the word in the group rooming list excel file to nationality code instead of nationality