Dropdown Menu and Marker keys

Hello

Is there a way I can use the words inside of a dropdown menu control as "source text" in a text layer?

In the screenshot you see there are two layers.  A text layer whose source text is derived by a marker comment (you can see the expression) and a dropdown menu with a list of countries. I'd like to pair the marker (or simply the source text of the text layer) with the words in the menù (not the index number...) Is it possible? Is there a way?

Thank you so much