There may be complication to install more than one Office XP MUI, and/or with IME, and/or Windows XP MUI. Use at your own risk for the above scenerios.
Yes, it is not a mistake, the 2 screen shots are different. If you choose custom install the first time, each language pack will ask you about the install type again.
Use this carefully!!!! The menus and dialogs in Office AND this applet (need to change it back to English) will be in the new language.