Adding the 'other' option to a preloaded list

I need to include an additional choice in a field that imports data from an external file. This is necessary because the external CSV file is immutable. For instance, I'm using select_one_from_file to import a list of country names from a CSV file, but I want to add the option 'other' to the list without altering the external CSV file. Thank you.

Hi @A_tbs
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or_other doesn't work with external selects. This is only a shortcut so if you use it in a form with select_one/select_multiple question under the hood that other option is added to the list of choices while converting the form from XLS to XML. If that list is in an external csv file we can't alter it automatically.