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It should be possible to translate the options on a regular dropdown field using the Form Languages feature on the Preferences. I checked your form and I can see that you have successfully translated the dropdown options.
Unfortunately however, it is not possible to do the same on the Configurable List widget. The widgets are loaded externally, so you cannot translate them using the Form Languages feature. A possible workaround would be to use a configurable list for each language and show/hide them depending on the language of the form. Here's a guide that can help you set it up: https://www.jotform.com/answers/813485.
If you need further assistance, please let us know.