I have a requirement to change the Cancel button label on the pega constellation Modals. 

I was able to change flow actions with the "Customize the action section button labels", however I cant find any way to change the labels for the Modal buttons.

Just to clarify the scenario, I have an embedded page list (table form) that we have enabled the allow adding condition, that of course adds a button to add items to the list, when that button is clicked, a modal comes up with the form to add the item, that modal has the Cancel and Submit buttons, and I need to configure the labels for those buttons.