In many programming languages, phrases are shortened to reduce the time taken to write programs. “var” instead of “variable”, “int” instead of integer, etc. This makes writing code much faster, but what if this was applied to the whole of the English language?
If programmers were to have the power to change how words are spelt and pronounced, what would change? Is every word shortened to three or four letters? Would leet speak become dominant? How practical would it be, how much more productive would the (English speaking) population be?
As for other languages, I’m not sure how well it would work. A majority of programming languages are based on English, and many other languages have restrictions that make it more difficult to change the spellings like this (e.g. gendered words, alphabet-less character sets). English, on the other hand, is infamous for having more exceptions than there are rules.
Nothing is stopping programmers from inventing and using new words. Getting people to use those words is another matter. You are hand waving the ability for programmers to dictate to non-programmers how language is used, but I think that hand waving also hand waves the idea of language to begin with. So I don’t think any answer you get will be meaningful.