Print source message to log as well

@@ -75,8 +75,8 @@ bot.onText(/(?!\/)(.+)/, (msg, match) => {
         var translate_options = {
           url: translate_api_url,
           form: {
-            'source': source, // Translate from source
-            'target': target, // to target
+            'source': source, // Before translation
+            'target': target, // After translation
             'text': received_msg // Message to translate
           },
           headers: {
@@ -93,7 +93,8 @@ bot.onText(/(?!\/)(.+)/, (msg, match) => {
             result.text = objBody.message.result.translatedText;
 
             // Send translated message
-            console.log(result.text);
+            console.log('Before: ' + received_msg);
+            console.log('After: ' + result.text);
             bot.sendMessage(chatId, result.text);
           }
         });