I assume this script is up to date because that's where I'm poking around in. Anyways, so I'm looking through the script, and I see a small typo. Nothing game breaking, but the x should be a y.
Don't know how to access the github, mind giving the link? It just throws a 400 every time I try to backtrack.
I think it's to cover X words that start with the "ex" sound. Like an xylophone. Although that might be a regional dialect, since I've heard it with a Z sound before...
it's probably for stuff like x-men or x-scissor, etc.. acronyms and stuff actual words starting with x are pretty much never used, but the above is much more common