Translate Child Theme

I want to do the translation in the fields of editing, the themes created in Listing Manager? such as price field to my language ..

I have seen that these are in: wp-content / themes / ST / framework / class / defaults_cart.php

I want to translate this: “price” => array (‘label’ => “Price”, “desc” => “Product price, only numerical values​​.”)

But then, as I can do in my child theme for an update, and not lose it, is this possible?