It would require to adopt a single standard, that is, how to encode that in the character encoding and the files. And it would still not stop someone from in th

It would require to adopt a single standard, that is, how to encode that in the character encoding and the files. And it would still not stop someone from in the same browser for example using sometimes one notation, sometimes the other notation, depending on e.g. if they're filling in a form for a European bank, or something related to programming.