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.
2. Set the translated Attribute Title in the Manage Labels section.
3. Go to Properties and set the translated names for the Attribute Option Values and Save Attribute.
This is what you will see on the storefront as a result.
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.