Hello,
Thank you for contacting Rank Math and bringing your concern to our attention.
If you choose other language URL formats, the multilingual sitemaps generated by Rank Math don’t follow the standard structure of multilingual sitemaps. WPML takes care of this by creating hreflang tags so that search engines know the default language of the page’s content and the translation available in different languages.
Learn more about WPML and Rank Math:
https://wpml.org/documentation/plugins-compatibility/optimize-multilingual-websites-using-rank-math-and-wpml/
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
and what url should I submit to GSC?
Hello,
Thanks for your reply.
You can submit only the main sitemap (your-domain.com/sitemap_index.xml), and Google would be able to find all the sub-sitemaps.
Hope that helps.
Thank you.
