Problem: The client has a Swedish site (kattly.se) and a Norwegian site (kattly.no) set up as a WP multisite and wants to add translated English pages to kattly.se. The client is concerned about the connection between the pages on kattly.se and kattly.no for hreflang tags, as WPML is installed separately on each domain. Solution: We advised the client that if kattly.no was not created from a translation made by WPML, they could simply add a new language to kattly.se from WPML > Languages > Add language, and include English. This action will create the new link kattly.se/en, allowing the client to start translations for the English pages. Additionally, if both sites have similar content, we recommended linking them together to share translation credits and translation memory. This can be done by visiting https://wpml.org/documentation/automatic-translation/automatic-translation-subscription-for-multiple-sites/. Using WPML’s translation memory can save money by reusing existing translations for repeated sentences.
If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 further assistance is needed, please open a new support ticket at WPML support forum.