Determines whether the current locale is right-to-left (RTL).

For more information on this and similar theme functions, check out
the {@link Conditional Tags} article in the Theme Developer Handbook.

function is_rtl() {
	global $wp_locale;
	if ( ! ( $wp_locale instanceof WP_Locale ) ) {
		return false;
	}
	return $wp_locale->is_rtl();
}