Hi Bryan,
Welcome to the community and congrats on your plugin!
And wow! I’ve never had an inclusion request that’s so comprehensive. 
So, a few things:
This is actually a problem, and violates rule 3 of the requirements. I know keying the plugin to the name of the language seemed like the clear, straightforward, no-brainer thing to do, but well…
I suggest you re-key to your website: wolfralyze, altho it’s really completely up to you. It just can’t be just the name of the language. (community-mathematica is a bit long but otherwise acceptable, and we can stretch this time if you want to go this route.) Note that this isn’t just a change to you PR. You’ll need to change the key in your pom and re-build because they key in the artifact has to match the properties file name, or the data generation job will break.
Barring the testing, the rest of the bureaucratic requirements look fine.
On the topic of your PR, please take a look at the Update Center project README. You’ve been a bit enthusiastic with the properties in your plugin file. 
And don’t forget to register your plugin (once you’ve re-keyed it) in update-center-source.properties.
Can you provide a link to this project so I can download & test, please? I can go ahead & work on that before you re-key. (Note that I’m here today & tomorrow & then off the rest of the week, so there are likely to be some delays.)
Thx,
Ann