Letter “C” pronounced as “S” or as “K”
“c” pronounced as “s” only before: “i” and “e”. Example: c’est cinema.
Before other letters “c” pronounced as “k”. Example: commercial.
To force “c” pronounce as “s” you need to use “ç” (cedilla or une cédille). Examples: comme ci, comme ça; France vs Français.
Be CaReFuL! Final Consonant Pronunciation in French
If a French word ends in C, R, F or L (the letters in CaReFuL), the final letter is pronounced.
If the word ends with another letter, the final letter is silent
This doesn’t work if the final letter is a “e”, “b”, “k” or “q” though. But since “b”, “k” and “q” are almost never used as final letters in French, the CaReFuL works in most cases.