The translation of the product page does not require the creation of a new item. In order to translate a product:

1. Go to Catalog > Products and choose the product you want to make the translation for from the Magento product grid.

Magento 2 products

2. Choose the Store View you want to translate product info for and start making translations.

Magento 2 store view change

3. Change the Name of the Product and other Magento product attributes if you like or just leave the default values of the default locale.

Magento 2 product page information

Magento 2 translated product info

4. Change the Description of the Magento product.

Magento 2 product page content

Magento 2 translated product content

Once you've finished press the Save button and go to the storefront to check out the changes. After you switch to the corresponding store view you will see that all the translations you've made have been successfully added.

Magento 2 product on the storefront

Magento 2 french product description

 Product Translation is just one of the series of articles about How to Configure Multi-Language Magento Website? which include information about the creation of a new store view, language packs installation, useful multi-language store extensions, CMS pages&blocks, email templates, and other translations in Magento 2 website. You should definitely get acquainted with them in order to know how to manage a multilanguage store.