Using rel=canonical in combination with Hreflang.
When you have implemented Hreflang to your website, you can check for errors within this section of GSC.
A Hreflang tag is a piece of code that helps
Google understand the intended language and country for your content.
Hreflang tags can be added either to the
of each page in your Magento store or indicated in your XML sitemap.
Make sure that you understand how to use
canonical well when you're implementing Hreflang, as otherwise you might kill your entire Hreflang implementation.
Hreflang- This refers to an HTML attribute that indicates
to the search engines the language and geographic region for which the page's content is intended.
If you use different URLs for different languages,
use Hreflang annotations to help Google search results link to the correct language version of a page.
If you get such a notification, that
means you need to resolve the issues in order to benefit from the“additional language or region targeting” offered by Hreflang.