The cleanest most straightforward Multilingual translation UI for WordPress

Extremely fast, intuitive, straightforward, clean UI for translating between any combination of languages (requires commercial plan), keeps WP database small and website fast, does not make countless copies of taxonomies, pages, posts etc. upon each language like other plugins of this kind do. It simply beats Polylang, WPML and Weglot out of the water no questions asked (tried Polylang and WPML for weeks both free and commercial versions). State of April 2021 is that TranslatePress is the plugin of choice for multilingual translation of WP/Woocommerce site. I use it in combination with Google API for machine automatisation when needed.

Close second is certainly ‘Qtranslate XT’, however, ‘Qtranslate XT’ is still not as ready and still in github development environment, and has a uninstallation problem (leaves tags in content after uninstallation).