As of Collaborator 11.0.11000, syntax highlighting can be added for previously unsupported languages and existing languages can be modified. It's a lot of work to figure out all the regexes for the...
Obviously I'm interested. I think if this was supported it could also allow SmartBear to release plugin-like language syntax highlighting additions so full installation upgrades aren't necessary just to get a new language syntax highlighting. It could also drive a lot more traffic to the forums/community since I've seen at least one aborted attempt to develop and share additional language highlighting in the forums.