How to change language in MB_OKCANCEL buttons text (Windows API) using MessageBoxExW with Python?

Question

I have an application which shows a window with two buttons (Ok and Cancel), I was using it in English, but now I want to show Ok and Cancel button's text in Chinese.

My original code was:

if win32con.IDOK == win32gui.MessageBox(self.hwnd,self.dic.voc["mainwin.quitConfirm"],
                                       self.dic.voc["mainwin.quitConfirmTitle"],
                                       win32con.MB_OKCANCEL):

And now I am trying with MessageBoxExW function, because in the API page says you can use any language in the last parameter (https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messageboxexw).

So now my code is as follows:

lang = win32api.MAKELANGID(4, 2)
if win32con.IDOK ==ctypes.windll.user32.MessageBoxExW(self.hwnd,self.dic.voc["mainwin.quitConfirm"], self.dic.voc["mainwin.quitConfirmTitle"], win32con.MB_YESNO, lang):

But it continues showing the text buttons in English, not in Chinese, I have also set in my computer, in Region and Language, Chinese(Simplified, PRC) in 'Formats' and in 'System Locale'. And my script is encoded as 'UTF-8'.

When I run this,

locale.getdefaultlocale(["LANGUAGE"])

I obtain,

('zh_CN', 'cp936')

I would appreciate very much any help or clue. Thank you very much.

Answer 1

If you are using Windows 10, you need to install a language pack in Windows for the specified language.

It does NOT have to be the default displayed language, but it needs to be in the installed language packs.