Index: languageinterface.module
===================================================================
--- languageinterface.module
+++ languageinterface.module
@@ -353,14 +353,14 @@
   $tbl = variable_get('tbl', '');
   $tl = variable_get('tl', '');
   foreach ($enabled as $lang) {
-    $text = db_result(db_query('SELECT native FROM {languages} WHERE language = "%s"', $lang));
+    $text = db_result(db_query("SELECT native FROM {languages} WHERE language = '%s'", $lang));
     if (!empty($tl[$lang])) {
       $tldef = $tl[$lang];
     }
     else {
       $tldef = $text;
     }
-    $currentweight = db_result(db_query('SELECT weight FROM {languages} WHERE language = "%s"', $lang));
+    $currentweight = db_result(db_query("SELECT weight FROM {languages} WHERE language = '%s'", $lang));
     $form['language_order']['lang_weight'][$lang] = array(
       '#type' => 'weight',
       '#title' => $text,
@@ -450,7 +450,7 @@
       
       
       $weight = $form_state['values']['language_order']['lang_weight'][$lang];
-      db_query('UPDATE {languages} SET weight = %d WHERE language = "%s"', $weight, $lang);
+      db_query("UPDATE {languages} SET weight = %d WHERE language = '%s'", $weight, $lang);
     }
    
     if (!empty($pretext)) {