get_user_locale( int|WP_User $user = 0 ): string

94function get_user_locale( $user = 0 ) {95	$user_object = false;96 97	if ( 0 === $user && function_exists( 'wp_get_current_user' ) ) {98		$user_object = wp_get_current_user();99	} elseif ( $user instanceof WP_User ) {100		$user_object = $user;101	} elseif ( $user && is_numeric( $user ) ) {102		$user_object = get_user_by( 'id', $user );103	}104 105	if ( ! $user_object ) {106		return get_locale();107	}108 109	$locale = $user_object->locale;110 111	return $locale ? $locale : get_locale();112}