That can equally be said of ‘ñ’ and ‘ç’; however, once one learns what functions the tilde and the cedilla serve, they become pronunciatory aids to show that words like “piñata” and “façade” are pronounced as  (or, more usually, ) and  (or ) — and not as  and  (or ). As I said, the functions of the ʻokina, tilde, and cedilla could all be learnt very quickly by those who are unfamiliar therewith. Just because a character is only ever found in borrowed terms does not mean that it cannot function as a pronunciatory aid.