Edited on December 21, 2021 after [52404]. Edited on January 3, 2022 after [52432]: two filters were renamed. Edited on January 4, 2022 after [52435]: the dropdown filter was renamed. Since WordPress 4.9, it’s possible to control the language of the login screen using the wp_lang query variable (example: wp-login.php?wp_lang=fr_FR). This is a hidden feature that was only used … Continue reading Introducing new language switcher on the login screen in WP 5.9