OWA2003: Force language in folders to be English only

Hello All.

I have an Exchange 2003 server. The users are using Outlook Web Access 2003.

The problem I have is that some users when they use the OWA2003 they noticed that the names of the folders (i.e. Inbox, Sent Items ,Deleted Items) are not in English language but in other Languages.

How can I force Exchange 2003 in order to apply English language for all folders, into all OWA2003 mailboxes.

For a example a user from his home PC told me that the folder names are in Greek but his is not Greek and his PC is not configured for Greek language.

Any ideas?

Thank you in advance.

Stergios