The words "HAIL HYDRA" change to "FYGJ FWBPY" in a certain code language. What would the words "MEIN KAMPF" change to?

Noticing the similarity, we can see that both the H change to F, and both the A change to Y. 

We can see the pattern in which each letter is replaced by the second last letter before it. 

H is replaced with F, I is replaced with G, L is replaced with J and so on. 

In the case of A, the code follows a cycle where it goes to the end of the lexicon, going to Z and then Y, and replacing A with Y. 

Hence, the word MEIN would translate to KCGL, and KAMPF would translate to IYKND

Giving the output as KCGL IYKND. 

Therefore, Option C is the correct answer.