https://polylang.pro/downloads/polylang-pro/

You can use as many languages as you want. RTL scripts are supported. WordPress languages packs are automatically downloaded and updated.You can translate posts, pages, media, categories, post tags, menus… Custom post types, custom taxonomies, sticky posts and post formats, RSS feeds and all default WordPress widgets are supported.The language is either set by the content or by the language code in url, or you can use one different subdomain or domain per language .The orginal content, categories, post tags as well as some other metas can be automatically copied when adding a new post or page translation . Two posts can even be synchronized to appear the same in different languages.A customizable language switcher is provided as a widget or in the nav menu.

Changelog

* Pro: Fix ACF fields not swown after a post was translated with DeepL

* Remove rewrite when registering the language taxonomy #1457

* Fix search block not filtered when displayed as button only #1459

* Fix current language not kept when using switch_to_blog() in multisite #1458