::::Still, is it not just convention? Is there really a reason to consider /tʃ/ and /dʒ/ ligatures and not /ts/ and/dz/? These are  frequently represented by just one letter (in other languages), like ‹c›, ‹ц› and ‹j›, which sends at least a signal they are considered one phoneme. But I agree it would not make a difference to this article. −