diff --git a/controller.py b/controller.py
index 47f15f66..634d3181 100644
--- a/controller.py
+++ b/controller.py
@@ -61,10 +61,11 @@ def messageFormatter(format_type:str, translation, message):
     return osc_message
 
 def changeToCTranslate2Process():
-    config.CHOICE_INPUT_TRANSLATOR = "CTranslate2"
-    config.CHOICE_OUTPUT_TRANSLATOR = "CTranslate2"
-    updateTranslationEngineAndEngineList()
-    view.printToTextbox_TranslationEngineLimitError()
+    if config.CHOICE_INPUT_TRANSLATOR != "CTranslate2" or config.CHOICE_OUTPUT_TRANSLATOR != "CTranslate2":
+        config.CHOICE_INPUT_TRANSLATOR = "CTranslate2"
+        config.CHOICE_OUTPUT_TRANSLATOR = "CTranslate2"
+        updateTranslationEngineAndEngineList()
+        view.printToTextbox_TranslationEngineLimitError()
 
 # func transcription send message
 def sendMicMessage(message):
diff --git a/model.py b/model.py
index 487b55be..7d89a0a9 100644
--- a/model.py
+++ b/model.py
@@ -183,13 +183,17 @@ class Model:
         # 翻訳失敗時のフェールセーフ処理
         if translation is False:
             translation_success_flag = False
-            translation = self.translator.translate(
-                                translator_name="CTranslate2",
-                                source_language=source_language,
-                                target_language=target_language,
-                                target_country=target_country,
-                                message=message
-                        )
+            while True:
+                translation = self.translator.translate(
+                                    translator_name="CTranslate2",
+                                    source_language=source_language,
+                                    target_language=target_language,
+                                    target_country=target_country,
+                                    message=message
+                            )
+                if translation is not False:
+                    break
+                sleep(0.1)
         return translation, translation_success_flag
 
     def getOutputTranslate(self, message):
@@ -210,13 +214,17 @@ class Model:
         # 翻訳失敗時のフェールセーフ処理
         if translation is False:
             translation_success_flag = False
-            translation = self.translator.translate(
-                                translator_name="CTranslate2",
-                                source_language=source_language,
-                                target_language=target_language,
-                                target_country=target_country,
-                                message=message
-                        )
+            while True:
+                translation = self.translator.translate(
+                                    translator_name="CTranslate2",
+                                    source_language=source_language,
+                                    target_language=target_language,
+                                    target_country=target_country,
+                                    message=message
+                            )
+                if translation is not False:
+                    break
+                sleep(0.1)
         return translation, translation_success_flag
 
     def addKeywords(self):
diff --git a/models/translation/translation_translator.py b/models/translation/translation_translator.py
index a71d0f55..d2717747 100644
--- a/models/translation/translation_translator.py
+++ b/models/translation/translation_translator.py
@@ -52,6 +52,18 @@ class Translator():
         self.ctranslate2_translator = None
         self.ctranslate2_tokenizer = None
 
+    def translateCTranslate2(self, message, source_language, target_language):
+        try:
+            self.ctranslate2_tokenizer.src_lang = source_language
+            source = self.ctranslate2_tokenizer.convert_ids_to_tokens(self.ctranslate2_tokenizer.encode(message))
+            target_prefix = [self.ctranslate2_tokenizer.lang_code_to_token[target_language]]
+            results = self.ctranslate2_translator.translate_batch([source], target_prefix=[target_prefix])
+            target = results[0].hypotheses[0][1:]
+            result = self.ctranslate2_tokenizer.decode(self.ctranslate2_tokenizer.convert_tokens_to_ids(target))
+        except Exception:
+            result = False
+        return result
+
     @staticmethod
     def getLanguageCode(translator_name, target_country, source_language, target_language):
         match translator_name:
@@ -115,12 +127,11 @@ class Translator():
                         to_language=target_language,
                         )
                 case "CTranslate2":
-                    self.ctranslate2_tokenizer.src_lang = source_language
-                    source = self.ctranslate2_tokenizer.convert_ids_to_tokens(self.ctranslate2_tokenizer.encode(message))
-                    target_prefix = [self.ctranslate2_tokenizer.lang_code_to_token[target_language]]
-                    results = self.ctranslate2_translator.translate_batch([source], target_prefix=[target_prefix])
-                    target = results[0].hypotheses[0][1:]
-                    result = self.ctranslate2_tokenizer.decode(self.ctranslate2_tokenizer.convert_tokens_to_ids(target))
+                    result = self.translateCTranslate2(
+                        message=message,
+                        source_language=source_language,
+                        target_language=target_language,
+                        )
         except Exception:
             import traceback
             with open('error.log', 'a') as f: