Here's a tutorial to explain you how to easily translate your WP-Script products.
You will be able to change an existing language or add a new language directly from your WordPress admin.
Install Loco Translate Plugin for free
Click here to download Loco Translate plugin

Then go to your plugins page in your WordPress admin and upload the zip file you have downloaded.
Finally click on install and activate the plugin.
Change an existing language
First find the product you want to translate. Click on Manage translations in the Loco Translate menu in your WP admin.
A list of your themes and plugins is displayed. Scroll to the product you want to translate.
Then click on the language pack you want to modify.
We will choose fr_FR pack as example. You can see all the words and expressions are listed. You will be able to make your changes directly in this section:

Don't forget to save your changes and the language pack will automatically updated.
Add a new language pack
Your language is not listed? No problem, with this plugin you can add a new language in 2 clicks:

Select your language:

Then click on start translating and you will be able to translate words and expressions and save your new language.