In order to translate the Product Attribute and Attribute Options Labels do the following:

1. Navigate to Stores > Configuration > Attributes > Product and choose the attribute you want to translate.

Magento 2 product attributes

2. Set the translated  Attribute Title in the Manage Labels section.

Magento 2 attribute title

3. Go to Properties and set the translated names for the Attribute Option Values and Save Attribute.

Magento 2 attribute options values

This is what you will see on the storefront as a result.

Magento 2 attribute options values on the storefront

 Product Attributes and Attribute Options 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, product&category, 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.