Click Start, point to All Programs, point to Microsoft Office, point to Microsoft Office Tools, and then click 2007 Microsoft Office system Language Settings.
Click the Display Language tab.
NOTE The Display Language tab appears only after you have installed a 2007 Office release Single Language Pack or the Multi-Language Pack.
In the Display 2007 Office release menus and dialog boxes in list, click the language in which you want to display 2007 Office release programs. To display a right-to-left user interface, you must click one of the languages that are written from right to left (such as Arabic, Urdu, or Persian). [Similarly, to display a left-to-right user interface (what you're trying to do), make sure that you select a language with a left-to-right user interface]