Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for the delay and for any inconvenience this issue may have caused you.
The second URL you have provided is redirecting to the homepage. However, the difference I’ve noticed in the first URL with translations is that the main category mark-roberts-collectible
is not showing when translated to English /en/. Could you please confirm if that is the case?
If so, we might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress & FTP logins in the designated Sensitive Data section.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
Thank you, and we really look forward to helping you.
Hello,
Everything is translated. So that could not be the issue. (mark-roberts-collectables-en)
I browsed the web further to get maybe an answer and I found another ID that could be translated by wpml.
I’ve set this to translate and now I can give in the category ID in the translate window.
And that worked.
To bad the link doesn’t happen automatically since the categories are linked in wpml. But I guess it’s beter then have to go out of the translate window in the classic editor to just manipulate the primary category.
Hello,
Thank you for the update.
We are glad that this issue is already resolved. For more information using Rank Math and WPML, you can also visit this link:
https://rankmath.com/kb/multilingual-seo-wpml/
If you have any other concerns, please don’t hesitate to contact us anytime by creating a new ticket to assist you further with anything else.
Thank you.