This document provides rules for using c and z in Spanish orthography. It states that c and z make the same sound and can be confused. The rules are that c is used before a, o, and u, while z is used before other vowels. It also gives examples of how z is used with suffixes like -aza, -anza, and -eza. The document recommends immersive Spanish courses and resources like BBC Spanish, RAE dictionary, and Spanish Wikipedia as useful ways to learn Spanish beyond just learning the letter rules.

1. letter Z Spanish orthography course
C and Z have the same sound so they can be mistaken, here are the rules of C and Z.
It is written c z and not in front of a, o and u.
Se escribe z y no c delante de a, o y u.
Z are written with the azo endings, -aza. Examples: piece, terrace
Se escriben con z las terminaciones -azo, -aza. Ejemplos: pedazo, terraza
Z are written with derivatives nouns ending in the voices -anza, -eza, ez. Examples: hope,
greatness, honesty. Se escriben con z los sustantivos derivados que terminan en las voces: -anza, -eza, -ez.
Ejemplos: esperanza, grandeza, honradez
However I would like to recommend you that the best way to learn spanish is in an inmersive environment like
these inmersive spanish courses. To Learn spanish you can also use some other useful resources
like : BBC spanish Portal, Rae Spanish Dictionary , spanish wikipedia , Spanish tutorial
I hope you will like the letter Z Spanish orthography course