Change Title on portfolio filters

As a follow up, I did find “Replace the word “ALL” in portfolio filter” in the documentation:

/**
 * Use the "avf_portfolio_sort_first_label" filter changes first label (All) in Portfolio Grid element
 *
 **/
 
add_filter('avf_portfolio_sort_first_label','new_portfolio_first_label');
function new_portfolio_first_label() {
$first_item_name = " NEW ALL TEXT ";
return $first_item_name;
}

I assume this would work for, $second_item_name; $third_item_name; $fourth_item_name; – would this be correct?
Also, how would I only apply it to the .av-current-sort-title and not effect the titles of the sort_by_cat items?
thanks!