Language of Index letters in phone contacts (WM5)

[CORVAX_I]

Hi everyone,
Does anybody have an idea on how to change the language of the Index letters in the contacts. I have the WM5 in Russian, but all my contacts are usually stored in English and it becomes a headche any time I want to find a contact from the list. I have to scroll it all the way down to what I want.
Is it possible to change the russian index letters to english?

Thanks.