Good code is maintainable code. And while you, as the original programmer, might be perfectly comfortable writing your code using Arabic variables and comment

Good code is maintainable code. And while you, as the original programmer, might be perfectly comfortable writing your code using Arabic variables and comments, what if the next person who has to maintain the code is from Korea? Or Russia? Or France? Or China? OK, maybe you're a small startup in Taiwan and so you don't care about the next maintainer in your company not being able to read or write Chinese. What if you decide to open source your code? Or Meta decides to offer you a zillion dollars to buy you out, but after they do their due diligence, realize that the code is utterly unmaintainable should they decide to outsource internationalizing the code so it will work in Brazil, so that requires native Portguese speakers (who can preferably be paid low, low wages) --- but they can't understand the code because it's using Chinese variables and comments. And then Meta decides to back out from the deal?