This add-on is now obsolete, a better method to prevent freezing has been incorporated into
Mer Band-Aid ZO-UI Fixes
A few days ago I joined the EU guild Twilight Market, and my game freezes every time I try to select it in the guild window. I thought it was a sync issue, because I left another guild the same day, so I waited for maintenance -- didn't help. Update 6 neither. Today I was told that others in the guild experience this issue, too.
Then I found a really old topic reporting it: http://forums.elderscrollsonline.com/en/discussion/127959/being-in-a-particular-guild-freezes-my-game-cant-get-in-game
Amazing how people figured out it only freezes in English, huh?
This add-on allows you to display the guild window without switching language. It does so by skipping a check for modifications to ranks and permissions, so it's probably not suitable for officers who need to do that, but for regular member it should just work.
If you know about any other guild(s) with this glitch, let me know, I'll add them to the list.