I was messing around with python a bit. And made a script that converts most of the json data (the different 'tags' in the top of the template:trait in the wiki, and the various 'changes_to' fields) into mediawiki content. Which is then easily copy pasted over the old mutation data. (Can't do that automated, as you need to check if there is special content on the page, and some of the mutation names are already taken by other pages).
I'll try to make some more scripts that will increase the ease of updating the wiki.https://github.com/Soyweiser/CDDA-Wiki-Scripts
Here it is. Not documented, and not feature complete by far.
Fyi, I updated all the mutations on the wiki using this script.