It’s great to see that you use MediaWiki for documentation:
Now, I noticed that Frankfurt value was not in the spec for locations here:
Wanted to add it, but realized that I don’t have permissions to register.
I’m running quite a few wiki-based projects and can tell for sure that opening only helps even though it comes at some community management price (enabling the technology, guarding against spam, managing policies).
I always open my wikis and help some other projects to maintain their communities. Will be happy to help you with yours if you’re interested.
P.S. don’t know if this is the right forum to post - couldn’t find community building / web site issues forum