Bulk assign values to the Choices of a select (or bulk upload a list of choices and values)

Bulk assign values to the Choices of a select (or bulk upload a list of choices and values)

Hello,
I want to create a select containing all world countries + 2 digits ISO code.

I've seen I can bulk upload the list of choices (= the name of the country) but still I have to assign the values (= the ISO codes) manually.

Is there a way to upload both of them in bulk?

Thank you