geany/geany — comment on commit 6ceb5ac1640dcf15f5bfb1415777fc7d5e58767e
File: src/document.c line 2372
By codebrainz:

It does for C and D for sure according to the code there. I have no idea where this is done for all the other languages supported by LexCPP (`c_like`), but presumably they are all grouped together somewhere and either all do or do not have that keyword index together.