https://bugs.winehq.org/show_bug.cgi?id=45208
--- Comment #7 from Zebediah Figura z.figura12@gmail.com --- (In reply to Hans Leidekker from comment #5)
The 5000 entries contain many duplicates. It's adding the same ProductCode value many times under each brand key. Both under HKEY_LOCAL_MACHINE\Software\Microsoft\Office\14.0\Registration and HKEY_LOCAL_MACHINE\Software\Microsoft\Office\14.0\User Settings.
There are 53 different brands and it adds 43 identical ProductCode entries for each brand, under both keys: 53 * 43 * 2 = 4558.
Yep, that part did strike me as suspicious. I think I forgot to mention it specifically. I couldn't figure out where they were coming from, though.
It's fairly likely that we should only be picking out one language from these somehow (although I won't count on it). I'll take another look at it, unless you think you're close to the problem.