>>49900819It could be that they can only read their own language, and those books were written by other Pokemon.
It could be they can read, but can't write, and instead end up writing only their name. Because language in Pokemon is very strange, it seems almost like ether the humans are under a curse to not be able to understand Pokemon, or the Pokemon are under a curse to not be understood, because they have no trouble understanding each other. But whatever it is, it isn't set in stone, see Mewoth and psychic types.
