When working with multilingual websites you might want to tell google about localized versions of your pages so that it helps google to point users to the most appropriate version of your page by language or region, you can find more details about this here.
If you are already into Sitecore SXA 1.6- the feature is inbuilt and doesn’t needs any customization- see the Sitecore SXA 1.6 release notes here for ref., but if you haven’t upgraded yet you have to write some custom code to support this configuration/feature.
In this case what we have to do here is:
- Create a new class that inherits from SitemapGenerator (part of Sitecore.XA.Feature.SiteMetadata )
- Override BuildSitemap() method.
You can write your own code under BuildSitemap() method and generate the customized sitemap.xml to support multiple languages.
Once you make this change- you will see sitemap.xml in the below format (below example shows three language versions of home page)
Hope this helps and you can use this solution until you move to SXA 1.6.
Happy learning 🙂