To be clear, I don't think the library would actually be used to accomplish this task. Rather I suspect a tounge in cheek reaction to years of tedious spelling adjustment disguised as urgent feature requests.
As a programmer working in the UK I've never been asked to rewrite something into British English. I have been instructed to convert some old codebase to American spellings to "avoid confusion". Probably about 6 times in 20 years of professional programming and usually by some product manager based in San José following an acquisition. This is why the library exists I expect.
When I worked on a big c++ codebase I found them essential for both ci/cd systems and actively debugging an issue. The valgrind suite of tools like cachegrind are very useful for both troubleshooting as well as classic static analysis and I heartily recommend investing some time in learning valgrind if you're writing c/c++ code for a platform valgrind runs on.
On the other hand commercial tools have been more of a mixed blessing but that is probably because every time ive seen them deployed the budget hasnt included sufficient engineering time, training or prof services to cut down huge numbers of false positives.
I think it's better than slacks sidebar threaded reply.
It also has better code blocks, less irritating pop up magic and no bots nagging you to fill in credentials all the time.
Do you have a source for the guardian editorial policy being pro the toppling of Gaddafi's regime in Libya? The Guardian is far from perfect but generally they were and are against military intervention by the UK.
This reminds me, a company I worked at used a bash script + zenity to automate the programming of devices using open-jtag. It worked pretty well and let the workers (skilled mostly in soldering and electronics assembly) do the programming and flashing of a fairly involved embedded device.
We eventually ended up replacing it with a local web-app but the zenity version was fast to write and good enough that the quick and dirty prototype survived for several years.
My pitch for zenity would be - "Need a prototype gui for users that struggle in the console? Consider zenity."