The way I would implement this is to add a bot that parses [[wiki-links]] the same way that the wiki parses them.

That way, if someone wants to automatically link to a wiki page for a neologism, they just have to put those brackets around the phrase.

This feature should work both for posts and for comments.

It might also be a good idea for the bot to be able to parse links in this form: [[standard name|alternate name]]. Another option is to create a redirect page on the wiki for any alternative titles for a concept.

Once this is implemented, we can go back through the old posts and add these wiki links wherever it would be appropriate.