Hi,
they originate from the syntax-highlighting file for maxima used by kate (see https://github.com/KDE/syntax-highlighting/blob/master/data/syntax/maxima.xml) or at least some earlier verision of it.

Hi,
I guess don't know enough to judge where the problems really came from. So go ahead and see how it goes, just keep an eye on compilation times.

Hi Filipe,
just a short heads up, we used to have "hard coded keywords", but that lead to some problems if the list was long, most notably the maxima backend ended up literally taking forever to compile on some systems (or more precisely it didn't compile at all; see https://github.com/KDE/cantor/commit/4832ed51197695c34fd2e0516237934d750783f5 for the commit that changed this). Is QtXml relly this big a dependence nowadays?
Getting the keywords on runtime if possible does sound like a great idea though.