In addition to controlling date and time settings, regional settings also control the way applications format numbers and currency values. However, after you install Word, you can change these defaults without changing them "Windows wide."
To change these settings only for Word, but not for the rest of Windows, follow these steps:
Enable the language you want to use, as discussed earlier in this chapter in the section "Enabling Languages in Office."
Choose Insert, Date and Time.
From the Language drop-down box, choose the language containing the options you expect to use most.
From the Available Formats box, choose the setting you expect to use most.
Click Yes to confirm that you want to change the default.