diff --git a/config.py b/config.py
index 93e70c2d..e206305d 100644
--- a/config.py
+++ b/config.py
@@ -649,9 +649,6 @@ class Config:
         self._OSC_PORT = 9000
         self._AUTH_KEYS = {
             "DeepL_API": None,
-            "DeepL": None,
-            "Bing": None,
-            "Google": None,
         }
         self._WEIGHT_TYPE = "small"
         self._MESSAGE_FORMAT = "[message]([translation])"
diff --git a/controller.py b/controller.py
index fceebc2c..05c3cb91 100644
--- a/controller.py
+++ b/controller.py
@@ -728,14 +728,13 @@ def createMainWindow():
     initSetTranslateEngine()
     initSetLanguageAndCountry()
 
-    # if (config.SELECTED_TAB_YOUR_TRANSLATOR_ENGINES[config.SELECTED_TAB_NO] == "DeepL_API" or
-    #     config.SELECTED_TAB_TARGET_TRANSLATOR_ENGINES[config.SELECTED_TAB_NO] == "DeepL_API"):
-    #     if model.authenticationTranslator("DeepL_API", config.AUTH_KEYS["DeepL_API"]) is False:
-    #         # error update Auth key
-    #         auth_keys = config.AUTH_KEYS
-    #         auth_keys["DeepL_API"] = None
-    #         config.AUTH_KEYS = auth_keys
-    #         view.printToTextbox_AuthenticationError()
+    if config.AUTH_KEYS["DeepL_API"] is not None:
+        if model.authenticationTranslatorDeepLAuthKey("DeepL_API", config.AUTH_KEYS["DeepL_API"]) is False:
+            # error update Auth key
+            auth_keys = config.AUTH_KEYS
+            auth_keys["DeepL_API"] = None
+            config.AUTH_KEYS = auth_keys
+            view.printToTextbox_AuthenticationError()
 
     # set word filter
     model.addKeywords()