wp-includes/class-wp-locale-switcher.php:111Switches the translations according to the given user's locale.
$user_idintbool public function switch_to_user_locale( $user_id ) { $locale = get_user_locale( $user_id ); return $this->switch_to_locale( $locale, $user_id ); }Introduced in 6.2.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-locale-switcher.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.