--- a/src/save_chat.js.luan	Wed Aug 13 10:31:24 2025 +0900
+++ b/src/save_chat.js.luan	Thu Aug 14 11:27:34 2025 +0900
@@ -17,7 +17,6 @@
 return function()
 	local chat = Http.request.parameters.chat or error()
 	local name = Http.request.parameters.name or error()
-	local language_region = Http.request.parameters.language_region or error()
 	local voice = Http.request.parameters.voice or error()
 	local show_text = Http.request.parameters.show_text
 	local autoplay = Http.request.parameters.autoplay
@@ -26,7 +25,6 @@
 		chat = get_chat_by_id(chat) or error()
 		chat.user_id == current_user().id or error()
 		chat.name = name
-		chat.language_region = language_region
 		chat.voice = voice
 		chat.show_text = show_text ~= nil
 		chat.autoplay = autoplay ~= nil