Board Thread:Support Requests - Getting Technical/@comment-32210970-20170911194546/@comment-1757994-20170912164443

Wikia's highlighter is GeSHi. I don't know if they bother to update the installed extension based on released version of GeSHi, but GeSHI is an open-source project, so it's probably willing to accept a new supported-language module for MediaWiki.

Wikia also appears to be working on a JavaScript-based highlighter based on something of which a significant fraction of variables and comments are written in Cyrillic. However Wikia's syntax highlighter isn't very far along.