Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
Rank Math usually only handles adding the default language to your sitemap. Other languages are handled automatically by the translation plugin you use by adding a hreflang into each page automatically.
Your multi-language plugin needs to add hreflang tags to your translated content so that Google knows that it is a translated version of some other page.
It is not a must that you have the translated pages in your sitemap. Please note this is perfectly fine and as per guidelines set by Google.
Currently, Google allows 2 methods for the translated pages:
1. To generate separate Sitemaps for all the languages.
2. To generate a single Sitemap and add hreflang tag on the respective pages.
That is what Rank Math follows and this method is approved by Google.
However, since the others are being added please check if your sitemap is being cached which causes links not to be automatically added to your sitemap.
You can check if you have a caching plugin or a caching platform such as Cloudflare that could be doing this. To prevent your sitemap from being cached please consider using this doc depending on the caching plugin you are using: https://rankmath.com/kb/exclude-sitemaps-from-caching/
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.
