[Resolved] Subject: Critical Multilingual SEO Issue: Multiple Sitemaps and Incorrect hreflang due to SlimSEO + ...

Problem:
You are running a multilingual WordPress site using WPML with languages configured in directories and SlimSEO for SEO needs. You encounter a critical SEO problem where, with WPML active, your setup generates three separate, root-level sitemaps for each language instead of a single comprehensive sitemap index. Additionally, the hreflang annotations for the homepage in all languages are incorrect within these duplicated sitemaps.
Solution:
We recommend disabling the WPML SEO addon if you are using SlimSEO, as WPML SEO is primarily designed to work with Yoast SEO and RankMath SEO. You can find more information here: WPML SEO documentation. Since SlimSEO handles the sitemap generation when integrated with WPML, we suggest consulting the SlimSEO support team for further assistance on this issue. Their documentation can be found here: SlimSEO and WPML integration.

Please note that this solution might be irrelevant if it's outdated or not applicable to your case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the issue persists, please open a new support ticket for further assistance.