The Mongolian language does not have the letters C and K as independent letters because the sounds that these letters represent in other languages are already represented by other letters in the Mongolian Cyrillic alphabet. The sound of "C" is represented by the letter "Ц" in Mongolian, while the sound of "K" is represented by the letter "К". Therefore, there is no need for the letters "C" and "K" to exist independently in the Mongolian language.