My theme gives the site owner the option of using each post’s “Excerpt” field to fill in the “meta description” tag for each page.
It would be helpful if I can filter the text label and description text that appears on the default Excerpt input control when viewed inside the post editor.
Does a filter or hook exist for this?
Alternately, I suppose I could use jQuery to do something via the DOM.
there is a filter hook you can use and it is
gettext
here:
if anyone trying to add for a specific post type you can try this code
I used the original answer and modified it to handle different post types: