Unfortunately, this. I did coverage work for WoTC for a few years and my custom dictionary is ridiculous.
For bonus points, I've also reviewed 200+ Spec Fic novels, so the amount of weird pronouns in the list is spectacular.
This is a cool idea, and a cool source for a rational anki deck. I'd post mine, but I don't add any custom spellings to chrome.
I looked at my custom spelling dictionary in Google Chrome, and thought custom spelling dictionaries in general might be a good place for you to look if you wonder what kinds of terms you'll have to explain to people to help them understand what you mean. If something's on your list, then you would probably have to provide an explanation of its usage to a given random individual from the world population.
Here's my list:
Share yours, too, if you'd like. Maybe something interesting or useful will come out of it. Maybe there will be patterns.