Sitting on the couch, I summoned the Dumbledore family grimoire. I have had very little chance to read it. But starting from the beginning, I could see why Albus was having some troubles deciphering it. Majority of the book was written in a mixture of Welsh, old English, A little bit of Gaelic, and a mixture of other popular languages. Anyone who wasn’t knowledgeable about them was going to have a tough time reading it. 