I am trying to create a form that inserts a specific value into a mailchimp audience database. The value saved would be based on a dropdown that the user chooses.
Currently they only way I see to do this is to name the option values of the dropdown to be exactly the value I want placed into Mailchimp. 
In the Tags section of Add to Mailchimp options, I am able to do what I want, which is to check if a form field(the drop down) matches a specific value then enter in a specific value into Mailchimp that is different from the form's value picked by the user. But that option is limited to just Tags in Formidable Forms. So I can't do that in other data fields.
Example: The form has a dropdown with "I am vegetarian" and "I am vegan" but then in my Mailchimp database, I have a custom data field that is Diet Restrictions and I already use "vegetarian" and "vegan" as values. They way it currently works, the form will add "I am vegetarian" into the mailchimp database rather than "vegetarian".
I don't see any way to transform "I am vegetarian" into "vegetarian" so that I can match our existing naming convention. (I know I could just change the drop down to say exactly the value I want, but in my actual work case that won't work. Just works out in the example.)