Hi,
We actually have some documentation on how to do translation overrides here:
www.hikashop.com/download/languages.html#modify
So basically, if you enter the translation key MY_PRODUCT_NAME in the name of your product, you can then edit each of your language files via the Languages tab of the HikaShop configuration and then add such row to the override file:
MY_PRODUCT_NAME="My product name"
Then, on the frontend, the name of the product will appear as "My product name" instead of "MY_PRODUCT_NAME".