English may be considered as simple as ABC , but the letter "C" presents many problems in English and is not used in PI words, which are a simpul as ABD.
C is still used as a single letter and in connected sounds such as Ch but NOT in PI words , because it is merely replacing other consonant letters with a Constant Sound.
Ca words start with a K in PI cavalry ; catastropic ; catch; Ce words start with a S in PI century ; certain; cesspool; Ch words continue with the Ch as a seperate sound with "joined "letters e.g. Challenged; church, champ; (BUT there are exceptions - champagne; charabanc; chamois ; chiffon, begin with "sh", whilst chiropract begins with a "k". Ci words start with "s" in PI civil ; cite; city; circular. Cl words start with "kl in PI clap ; classic; climb'; clot . clown Co words start with "ko" in PI coach; coast; coat. Cr words start with "kr" in PI crack; cream; cross; crown Cu words start with "ku" in PI culture; curate; cure; customise Cy words start with "s" in PI cyanide; cycling ; cylinder; cyst. Cz as in Czecholsolvakia starts with a Ch in PI
It may help to realise that k c s & z are connected in English with overlapping sounds in pitch 1 2 & 3 of the same basic sound.
Whulst "s" & "k " take out "c" in PI "z" takes out several "s" e.g.:- Aologise - apolowjize Arose - arooz Brethalyse - brethaliiz Brethaliser - brethaliizr Erase - iraaz jeopardise - jepaardiiz Laser - lazer (as laze, lazy ) Miser -miizer Nasal -naazal Poser -pozer Sympathise - simpathiiz
In PI the spelling of all words is "logical" to their sound.
In considering the letter "K" , the further complication must be remembered that, in English, K is also used as a "silent" Letter e.g. knee; knelt; knickers; knife; knitwear; knowledge; knight; knob; knot. These become nee; nelt; nikers; niif; nitweer; nolej; niit ; nob; not; in PI.