diff --git a/pyrogram/client.py b/pyrogram/client.py
index 1e8fef35..6db0ae02 100644
--- a/pyrogram/client.py
+++ b/pyrogram/client.py
@@ -227,6 +227,8 @@ class Client(Methods):
     SYSTEM_VERSION = f"{platform.system()} {platform.release()}"
 
     LANG_CODE = "en"
+    LANG_PACK = ""
+    SYSTEM_LANG_CODE = "en-US"
 
     PARENT_DIR = Path(sys.argv[0]).parent
 
@@ -251,7 +253,9 @@ class Client(Methods):
         app_version: str = APP_VERSION,
         device_model: str = DEVICE_MODEL,
         system_version: str = SYSTEM_VERSION,
+        system_lang_code: str = SYSTEM_LANG_CODE,
         lang_code: str = LANG_CODE,
+        lang_pack: str = LANG_PACK,
         ipv6: Optional[bool] = False,
         alt_port: Optional[bool] = False,
         proxy: Optional[dict] = None,
@@ -287,7 +291,9 @@ class Client(Methods):
         self.app_version = app_version
         self.device_model = device_model
         self.system_version = system_version
+        self.system_lang_code = system_lang_code.lower()
         self.lang_code = lang_code.lower()
+        self.lang_pack = lang_pack.lower()
         self.ipv6 = ipv6
         self.alt_port = alt_port
         self.proxy = proxy
diff --git a/pyrogram/session/session.py b/pyrogram/session/session.py
index c84a3cb4..87d57409 100644
--- a/pyrogram/session/session.py
+++ b/pyrogram/session/session.py
@@ -131,9 +131,9 @@ class Session:
                                 app_version=self.client.app_version,
                                 device_model=self.client.device_model,
                                 system_version=self.client.system_version,
-                                system_lang_code=self.client.lang_code,
+                                system_lang_code=self.client.system_lang_code,
                                 lang_code=self.client.lang_code,
-                                lang_pack="",
+                                lang_pack=self.client.lang_pack,
                                 query=raw.functions.help.GetConfig(),
                             )
                         ),