Can't this be solved somewhat by adding a "cjk mode" zero-width character, like we have right-to-left/left-to-right embedding characters? Yes, yes, it's yet ano

Can't this be solved somewhat by adding a "cjk mode" zero-width character, like we have right-to-left/left-to-right embedding characters? Yes, yes, it's yet another standard, but there doesn't seem to be any way to indicate in the text stream itself what characters to use otherwise.