How to change the text of Publish Button

You can use the following code to change Publish button’s text to Save even after editing Post Status.
Do not forget: Clicking OK or Cancel buttons when editing Post Status will change Publish button’s text. This happens also when editing Post Visibility and Publish time. I used setTimeout() to postpone changing Publish button’s text after Post status, visibility and time edited.

function change_button_text(){
    echo "<script>
        jQuery(document).ready( function() {        
            jQuery('input[id=\"publish\"]').val('Save');
            jQuery('.save-post-status').click(change_on_post_status_visibilty_time_edit);
            jQuery('.cancel-post-status').click(change_on_post_status_visibilty_time_edit);
            jQuery('.save-post-visibility').click(change_on_post_status_visibilty_time_edit);
            jQuery('.cancel-post-visibility').click(change_on_post_status_visibilty_time_edit);
            jQuery('.save-timestamp').click(change_on_post_status_visibilty_time_edit);
            jQuery('.cancel-timestamp').click(change_on_post_status_visibilty_time_edit);
        });
        
        function change_on_post_status_visibilty_time_edit(){
            setTimeout( function() {jQuery( 'input[id=\"publish\"]' ).val('Save')}, 100);
        };
        
        </script>";
}

add_action('admin_head-post.php', 'change_button_text');
add_action('admin_head-post-new.php', 'change_button_text');