What nonsense. Every single modern operating system has bindings that are usable with all keyboard layouts. Having such a default is not only possible, it's the status quo everywhere, except in software designed during the era of the moon landings.
You're not wrong about the poor default keybindings. When the effort to fix it on your part is probably less than all the time you've spent complaining about it, chances are you really are not part of the intended user base.
So something completely unattainable by a small dev team on a startup budget. Great! These are the standards by which we prevent any good things from being created.
You don't have to "develop" anything, you just have to follow the binding conventions for the platform(s). In practice, this simply means using Ctrl/Cmd+[LETTER/NUMBER] for everything, and the problem is solved.
