Problem: You are trying to set different permalink structures for posts in Dutch and English using WPML. Specifically, Dutch posts should use the permalink structure: /nieuwsitems/%postname%/, and English posts should use: /newsitems/%postname%/. Despite enabling 'Translate custom post and taxonomy base slugs' in WPML > Settings, setting the post type 'Posts' to Translatable - only show translated items, and configuring slug translations in WPML > String Translation, all posts, regardless of language, use /nieuwsitems/%postname%/ instead of the expected language-specific slugs.
Solution: We have found that WPML does not support translating custom permalink structures. It only supports translating custom slug translation when the custom type is registered. For more details, you can refer to our guide for developers here: Translating Slugs for Custom Post Type Archives.
As a workaround, consider using a Custom Post Type (CPT) instead of standard posts, as this allows for slug translation. Alternatively, you can create a category with the desired slug, assign it to all relevant posts, and update the permalink structure to include the category. This category slug can then be translated. For more guidance, check out these links:
If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 you still need assistance, please open a new support ticket at WPML Support Forum.
