Using select_one_from_file question type

@fpageot, have you tried using select_one_from_file (it should help you handle external choices stored in a CSV file). Moreover, this question type is supported by both Collect android app and Enketo.

For details, please view our support article Select One or Many From External File Question Type. We also have some workarounds in our community:

A simple workaround of using select_one_from_file question type:

If you wish to use the cascading select with select_one_from_file question type: