How could I change format of product code?

now product have this template:
product_1
product_2
product_3 .... and so on

How could I change this? may be for something like that: Артикул: 1, Артикул: 2 and so on.... ?

The product code is meant to be a code ie. an alphanumerical text.
Normally the users fill it with the SKU so HikaShop does not have to generate it. Also, when users do not enter it, it will be generated from the product name. Then, if the product name is not usable (ie. if none of the letters of the product name are latin letters/numbers) the system will use such product_X code.
Using a translation here is not what we want to do.