diff --git a/VRC_ChatBox_translator.py b/VRC_ChatBox_translator.py
index 8b026bc7..de84a672 100644
--- a/VRC_ChatBox_translator.py
+++ b/VRC_ChatBox_translator.py
@@ -6,42 +6,50 @@ from pythonosc import udp_client
 import customtkinter
 
 # global
+PATH_CONFIG = "./config.json"
 OSC_IP_ADDRESS = "127.0.0.1"
 OSC_PORT = 9000
 TARGET_LANG = "EN-US"
 CHOICE_TRANSLATOR = "DeepL"
 AUTH_KEY = None
 TRANSLATOR = None
-PATH_CONFIG = "./config.json"
+MESSAGE_FORMAT = "[message]([translation])"
 
 # load config
-if os.path.isfile(PATH_CONFIG) is False:
-    with open(PATH_CONFIG, 'w') as fp:
-        config = {
-            "OSC_IP_ADDRESS": "127.0.0.1",
-            "OSC_PORT": 9000,
-            "TARGET_LANG": "EN-US",
-            "CHOICE_TRANSLATOR": "DeepL",
-            "AUTH_KEY": None
-        }
-        json.dump(config, fp, indent=4)
+if os.path.isfile(PATH_CONFIG) is not False:
+    with open(PATH_CONFIG, 'r') as fp:
+        config = json.load(fp)
+    if "OSC_IP_ADDRESS" in config.keys():
+        OSC_IP_ADDRESS = config["OSC_IP_ADDRESS"]
+    if "OSC_PORT" in config.keys():
+        OSC_PORT = config["OSC_PORT"]
+    if "TARGET_LANG" in config.keys():
+        TARGET_LANG = config["TARGET_LANG"]
+    if "CHOICE_TRANSLATOR" in config.keys():
+        CHOICE_TRANSLATOR = config["CHOICE_TRANSLATOR"]
+    if "AUTH_KEY" in config.keys():
+        AUTH_KEY = config["AUTH_KEY"]
+    if "MESSAGE_FORMAT" in config.keys():
+        MESSAGE_FORMAT = config["MESSAGE_FORMAT"]
 
-with open(PATH_CONFIG, 'r') as fp:
-    config = json.load(fp)
-if "OSC_IP_ADDRESS" in config.keys():
-    OSC_IP_ADDRESS = config["OSC_IP_ADDRESS"]
-if "OSC_PORT" in config.keys():
-    OSC_PORT = config["OSC_PORT"]
-if "TARGET_LANG" in config.keys():
-    TARGET_LANG = config["TARGET_LANG"]
-if "CHOICE_TRANSLATOR" in config.keys():
-    CHOICE_TRANSLATOR = config["CHOICE_TRANSLATOR"]
-if "AUTH_KEY" in config.keys():
-    AUTH_KEY = config["AUTH_KEY"]
+with open(PATH_CONFIG, 'w') as fp:
+    config = {
+        "OSC_IP_ADDRESS": OSC_IP_ADDRESS,
+        "OSC_PORT": OSC_PORT,
+        "TARGET_LANG": TARGET_LANG,
+        "CHOICE_TRANSLATOR": CHOICE_TRANSLATOR,
+        "AUTH_KEY": AUTH_KEY,
+        "MESSAGE_FORMAT": MESSAGE_FORMAT,
+    }
+    json.dump(config, fp, indent=4)
 
 # deepl connect
 if AUTH_KEY is not None:
     TRANSLATOR = deepl.Translator(AUTH_KEY)
+    try:
+        TRANSLATOR.translate_text(" ", target_lang="EN-US")
+    except:
+        TRANSLATOR = None
 
 # GUI
 customtkinter.set_appearance_mode("System")
@@ -50,30 +58,37 @@ customtkinter.set_default_color_theme("blue")
 class ToplevelWindow_config(customtkinter.CTkToplevel):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self.geometry(f"{280}x{150}")
+        self.geometry(f"{450}x{160}")
         self.resizable(False, False)
 
         self.title("Config")
         self.label_ip_address = customtkinter.CTkLabel(self, text="OSC IP address:", fg_color="transparent")
         self.label_ip_address.grid(row=0, column=0, columnspan=1, padx=5, pady=5, sticky="nsew")
-        self.entry_ip_address = customtkinter.CTkEntry(self, placeholder_text=OSC_IP_ADDRESS)
-        self.entry_ip_address.grid(row=0, column=2, columnspan=1, padx=1, pady=5, sticky="nsew")
+        self.entry_ip_address = customtkinter.CTkEntry(self, width=300, placeholder_text=OSC_IP_ADDRESS)
+        self.entry_ip_address.grid(row=0, column=1, columnspan=1, padx=1, pady=5, sticky="nsew")
         self.button_ip_address = customtkinter.CTkButton(self, text="✓", width=1, command=self.update_ip_address)
-        self.button_ip_address.grid(row=0, column=3, columnspan=1, padx=1, pady=5, sticky="nsew")
+        self.button_ip_address.grid(row=0, column=2, columnspan=1, padx=1, pady=5, sticky="nsew")
 
         self.label_port = customtkinter.CTkLabel(self, text="OSC Port:", fg_color="transparent")
         self.label_port.grid(row=1, column=0, columnspan=1, padx=5, pady=5, sticky="nsew")
         self.entry_port = customtkinter.CTkEntry(self, placeholder_text=OSC_PORT)
-        self.entry_port.grid(row=1, column=2, columnspan=1, padx=1, pady=5, sticky="nsew")
+        self.entry_port.grid(row=1, column=1, columnspan=1, padx=1, pady=5, sticky="nsew")
         self.button_port = customtkinter.CTkButton(self, text="✓", width=1, command=self.update_port)
-        self.button_port.grid(row=1, column=3, columnspan=1, padx=1, pady=5, sticky="nsew")
+        self.button_port.grid(row=1, column=2, columnspan=1, padx=1, pady=5, sticky="nsew")
 
         self.label_authkey = customtkinter.CTkLabel(self, text="DeepL Auth Key:", fg_color="transparent")
         self.label_authkey.grid(row=2, column=0, columnspan=1, padx=5, pady=5, sticky="nsew")
         self.entry_authkey = customtkinter.CTkEntry(self, placeholder_text=AUTH_KEY)
-        self.entry_authkey.grid(row=2, column=2, columnspan=1, padx=1, pady=5, sticky="nsew")
+        self.entry_authkey.grid(row=2, column=1, columnspan=1, padx=1, pady=5, sticky="nsew")
         self.button_authkey = customtkinter.CTkButton(self, text="✓", width=1, command=self.update_authkey)
-        self.button_authkey.grid(row=2, column=3, columnspan=1, padx=1, pady=5, sticky="nsew")
+        self.button_authkey.grid(row=2, column=2, columnspan=1, padx=1, pady=5, sticky="nsew")
+
+        self.label_message_format = customtkinter.CTkLabel(self, text="Message Format:", fg_color="transparent")
+        self.label_message_format.grid(row=3, column=0, columnspan=1, padx=5, pady=5, sticky="nsew")
+        self.entry_message_format = customtkinter.CTkEntry(self, placeholder_text=MESSAGE_FORMAT)
+        self.entry_message_format.grid(row=3, column=1, columnspan=1, padx=1, pady=5, sticky="nsew")
+        self.button_message_format = customtkinter.CTkButton(self, text="✓", width=1, command=self.update_message_format)
+        self.button_message_format.grid(row=3, column=2, columnspan=1, padx=1, pady=5, sticky="nsew")
 
     def update_ip_address(self):
         global OSC_IP_ADDRESS
@@ -102,11 +117,22 @@ class ToplevelWindow_config(customtkinter.CTkToplevel):
         config["AUTH_KEY"] = AUTH_KEY
         with open(PATH_CONFIG, "w") as fp:
             json.dump(config, fp, indent=4)
+
+        TRANSLATOR = deepl.Translator(AUTH_KEY)
         try:
-            TRANSLATOR = deepl.Translator(AUTH_KEY)
+            TRANSLATOR.translate_text(" ", target_lang="EN-US")
         except:
             TRANSLATOR = None
 
+    def update_message_format(self):
+        global MESSAGE_FORMAT
+        MESSAGE_FORMAT = self.entry_message_format.get()
+        with open(PATH_CONFIG, "r") as fp:
+            config = json.load(fp)
+        config["MESSAGE_FORMAT"] = MESSAGE_FORMAT
+        with open(PATH_CONFIG, "w") as fp:
+            json.dump(config, fp, indent=4)
+
 class App(customtkinter.CTk):
     def __init__(self):
         super().__init__()
@@ -146,7 +172,7 @@ class App(customtkinter.CTk):
         self.entry.bind("<Return>", self.press_key)
 
         if TRANSLATOR is None:
-            self.textbox.insert("0.0", f"Auth Keyを設定してください\n")
+            self.textbox.insert("0.0", f"Auth Keyを設定してないか間違っています\n")
 
         self.combobox_language.set(TARGET_LANG)
         self.combobox_translator.set(CHOICE_TRANSLATOR)
@@ -177,14 +203,14 @@ class App(customtkinter.CTk):
 
     def press_key(self, event):
         if TRANSLATOR is None:
-            self.textbox.insert("0.0", f"Auth Keyを設定してください\n")
+            self.textbox.insert("0.0", f"Auth Keyを設定してないか間違っています\n")
         else:
             entry = self.entry.get()
 
             # translate
             if CHOICE_TRANSLATOR != "Disable":
                 result = TRANSLATOR.translate_text(entry, target_lang=TARGET_LANG)
-                chat_message = f"{entry} ({result.text})"
+                chat_message = MESSAGE_FORMAT.replace("[message]", entry).replace("[translation]", result.text)
             else:
                 chat_message = f"{entry}"