PPOM Price Table labels can be changed via following filter, paste this into your active theme’s functions.php file:
add_filter('ppom_input_vars', 'ppom_js_vars_update', 2, 99);
function ppom_js_vars_update($js_vars, $product) {
//Change the Product Price Label
$js_vars['product_base_label'] = 'New Label';
// Following are the labels keys
/*
$js_vars['total_discount_label'] = sprintf(__("%s", 'ppom'), $ppom_label_total_discount);
$js_vars['price_matrix_heading'] = sprintf(__("%s", 'ppom'), $ppom_label_discount_price);
$js_vars['product_base_label'] = sprintf(__("%s", 'ppom'), $ppom_label_product_price);
$js_vars['option_total_label'] = sprintf(__("%s", 'ppom'), $ppom_label_option_total);
$js_vars['fixed_fee_heading'] = sprintf(__("%s", 'ppom'), $ppom_label_fixed_fee);
$js_vars['total_without_fixed_label'] = sprintf(__("%s", 'ppom'), $ppom_label_total);
$js_vars['product_quantity_label'] = __("Product Quantity", "ppom");
$js_vars['product_title'] = sprintf(__("%s", "ppom"), $product->get_title());
$js_vars['per_unit_label'] = __("unit", "ppom");
*/
return $js_vars;