Change “any” text

Hello,

In my store, I have a dropdown list with the text “any”. How do I change to “Select a” using php? I’m looking for a solution, but I haven’t found a good one.

In addition, I would like your suggestion to be able to translate using WPML.

Check my link to understand.

Thanks for help.
Best Regards.

The page I need help with: [log in to see the link]