Fix to the translation to return json against global json format later

question.php

@@ -244,17 +244,19 @@ public function process_feedback(string $feedback) {
      * @param string $text
      * @return string
      */
-    protected function llm_translate(string $text) :string {
+    protected function llm_translate(string $text): string {
         if (current_language() == 'en') {
             return $text;
         }
         $ai = new ai\ai();
         $cache = cache::make('qtype_aitext', 'stringdata');
         if (($translation = $cache->get(current_language().'_'.$text)) === false) {
-            $prompt = 'translate "'.$text .'" into '.current_language();
+            $prompt = 'translate "'.$text .'" into '.current_language().
+                ' respond with json object with a single field named transation';
             $llmresponse = $ai->prompt_completion($prompt);
             $translation = $llmresponse['response']['choices'][0]['message']['content'];
-            $translation = trim($translation, '"');
+            $translationobject = json_decode($translation);
+            $translation = trim($translationobject->translation, '"');
             $cache->set(current_language().'_'.$text, $translation);
         }
         return $translation;