diff --git a/app/Paper/HtmlToPos.php b/app/Paper/HtmlToPos.php
index 942f1fe..6b91fef 100644
--- a/app/Paper/HtmlToPos.php
+++ b/app/Paper/HtmlToPos.php
@@ -62,13 +62,17 @@ class HtmlToPos
 
     public function vocabularyWord($posText)
     {
-        $voc = new Vocabulary();
-        $randomWord = $voc->getRandomWord();
-        $word = $voc->getWord($randomWord);
+        if (strstr($posText, '[vocabulary_word]')
+            || strpos($posText, '[vocabulary_short]')
+            || strpos($posText, '[vocabulary_long]')) {
+            $voc = new Vocabulary();
+            $randomWord = $voc->getRandomWord();
+            $word = $voc->getWord($randomWord);
 
-        $posText = str_replace('[vocabulary_word]', $word->word, $posText);
-        $posText = str_replace('[vocabulary_short]', $word->short, $posText);
-        $posText = str_replace('[vocabulary_long]', $word->long, $posText);
+            $posText = str_replace('[vocabulary_word]', $word->word, $posText);
+            $posText = str_replace('[vocabulary_short]', $word->short, $posText);
+            $posText = str_replace('[vocabulary_long]', $word->long, $posText);
+        }
 
         return $posText;
     }