If one could understand forty to fifty percent of a language, the rest which they didn't understand would become like a ciphertext. According to the words said in front and behind, one could be able to guess the meaning of those coded words.
This was what Qin Mu had done.
He originally knew nothing about the devil language, but because of fate, he had heard the devil language at Goddess Pass in Great Ruins and memorized it. After that, he had met a devil god who was sealed in the wall in Doom Suppression Palace who taught him Great Freedom Mudra, so he learned a bit more of the devil language.
With this knowledge, he could deduce what was being said. It was like deciphering a ciphertext.
