How can I create an 'rtl' form?

ChronoForms supports RTL - right-to-left - language layouts with a setting on the Styles tab of the Form Editor. This changes the CSS to move the labels to the right and make the other changes needed.

For a Multi-Language site where you need to switch between rtl and ltr languages you can add this code in a Custom Code action in the form On Load event before the HTML (render form) action. 

<?php
$jlang = JFactory::getLanguage();
$dir = $jlang->get('rtl');
if ( $dir == 1 ) {
  $form->params->set('rtl_support', 1);
}
?>