Why not? Whole books have been written in different languages. Just think of children learning to program, schools, ... Not the whole world is about English.
Even not all programming languages are English. https://en.wikipedia.org/wiki/Non-English-based_programming_languages
I get your point but it's generalizing. There is quite some software out there that's not even available in English.
i18n is so important because there is more than just English navel-gazing.
I based my opinion on what came out after crunching the numbers,
of curse it's my personal opinion but me writing a tutorial on how to calculate hashes using python in my native language is catering to an audience that doesn't really exist.
it is, however a different story when it comes to software that are not in English. but I only used tow or three of them in my lifetime, and I'm on my computer 24/7.
Totaly agree with you.
very good analysis ---