One possibility would be to write each lexical set differently. This wouldn't be too difficult within America -- we already spell "marry", "merry", and "Mary" d

One possibility would be to write each lexical set differently. This wouldn't be too difficult within America -- we already spell "marry", "merry", and "Mary" differently, for example. But extending this to British English might be difficult, because nonrhoticity has restructured the vowel system and Americans would have to learn to indicate the trap-bath split by rote. Even if each Anglophone country adopted its own alphabet, we'd still have to figure out what to do about words whose pronunciation varies, like (in America) "aunt", "route", "catch", "sure", "coupon", and "been".