Ç is the only letter that was specifically placed on the Portuguese and Spanish keyboard as an independent key (French keyboard has ç, but not as an independent key).
The funny fact is that in Portuguese:
- cassa sounds like caça - different from casa (that sounds like caza);
- nassão sounds like nação;
- pansa sounds like pança, notice that only one s is sufficient to express the ss sound when near the n: e.g. pensa (to think) ≠ pesa (to weight, with a z sound);
- passo sounds like paço and passo already exists as a word.
- possa sounds like poça and possa also exists already.
- pessa sounds like peça.
So why was ç created?