Multisite Translation Relations helps WordPress Multisite networks connect posts and pages that represent the same content in different languages.
The plugin stores relation metadata on each content item, provides admin columns and row actions for editors, outputs frontend language switcher markup, and adds SEO-friendly hreflang tags for published related content.
This is not an automatic translation plugin. It manages relationships between translated content that editors create or link across subsites.
Documentation: https://mudosdigital.com/multisite-translation-relations/
[mstr_language_switcher].