Scala, huh?
Skimming a few of the posts, there are maybe 15+ references to C++ for post, and 1 for Julia at most.
The detection algorithm seems to be a bit iffy.
Pretty sure that a string like "c\+\+" was there before.
It seems that in the new version the old patterns have been commented out, the search method was changed and c++ removed altogheter:
https://github.com/venkateshthallam/hn-whoishiring-analysis/...