diff --git a/langfilter/langfilter.php b/langfilter/langfilter.php
index bbdc47fe..53a7ac8a 100644
--- a/langfilter/langfilter.php
+++ b/langfilter/langfilter.php
@@ -93,11 +93,15 @@ function langfilter_prepare_body(&$a,&$b) {
 	}
 
 	$found = false;
-    $l = new Text_LanguageDetect;
-    $l->_name_mode = 2;   // two letter codes
-    $l->_threshold = 600; // make it a bit harder to be confident with a lng
-                          // IOW make it more possible that lng is correct
-    $lng = $l->detectSimple($b['html']);
+
+    $opts = $b['item']['postopts'];
+    if ( $opts ) {
+      if ( preg_match('/^lang=([^;]*)/', $opts, $matches ) )
+      {
+         $lang = $matches[1];
+	 $lng = Text_LanguageDetect_ISO639::nameToCode2($lang);
+      }
+    }
     if ($lng==null)
 		return;
     if (! in_array($lng, $arr))