I look at this very simply. If you are a business that is marketing the app to external consumers, adding internationalization and accessibility protects you fr

I look at this very simply. If you are a business that is marketing the app to external consumers, adding internationalization and accessibility protects you from possible legal and regulatory trouble, while also increasing the size of your potential user base. But for side projects? No, when it comes to my side project, I'm the master, in the dictator, what I say goes. Users don't like it? Tough, go build your own app.