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 terms not filtered by the current language in the block editor custom taxonomy component panel

* Pro: Fix fatal error when using plain permalinks on multisite

* Pro: Fix rewrite rules incorrectly refreshed when saving strings translations

* Fix incorrect rewrite rules leading to error 404 on mutisite #1366

* Fix fatal error when using symlinked MU plugins that are not in open_basedir #1368