--- recaptcha.module    (revision 2428)
+++ recaptcha.module    (working copy)
@@ -170,6 +170,14 @@ function recaptcha_captcha() {  
            $js .= ", custom_theme_widget : 'recaptcha_custom_theme_widget'";
            $recaptcha_form_value = theme('recaptcha_custom_widget');
           }
+
+          // Add i18n support
+          global $language;
+          if ($language->language) {
+            // reCAPTCHA uses two-character language codes, so 'pt-br' must be
+            // passed as 'pt' (cf. http://wiki.recaptcha.net/index.php/I18n)
+            $js .= ", lang : '". substr($language->language, 0, 2) ."'";
+          }
           
           // Set the default tab index
           if (!empty($recaptcha_tabindex)) {