In ep 26 Marinette says the book is written in code but somehow Adrien and Lila had no problem reading about Volpina and Miraculouses. I know Adrien speaks a bit of Chinese, but its a language not a code. Plus Tiki said the master knows how to decipher the codes.
Also if Hawkmoth is Gabriel, why does he only use one Miraculous? He has the peacock one in his safe behind the painting. I mean he needs 2 Miraculouses from LB and CN to become all powerful, why use only one unless you don't know about it at all?