If your computer is set up with the French language, try this, originally
suggested by Guylaine:
The fix is quite simple but still strange ...
For some reason the registry key 1025 is set to ON (concerning arabic
language) and the arabic language is not taken care of ...
You either turn it OFF :
Key : HKEY_USERS\<<user
identity>>\Software\Microsoft\Office\9.0\Common\LanguageRessources\1025
(As to be done for every user on the machine)
or install the arabic language (good for everyone):
Control Panel
Regional settings
General tab
Check the arabic language
Accept and reboot