Bane is highly intelligent; in Bane of the Demon, Ra's al Ghul says that Bane "has a mind equal to the greatest he has known."[8] In prison, he taught himself various scientific disciplines equal to the level of understanding of leading experts in those fields.[4] He knows six active languages and at least two additional arcane and dead ones. Among these are Spanish, English, Urdu, Argh, Persian, and Latin.[8][41] The Bane of the Demon storyline reveals that he has a photographic memory. Within one year, he is able to deduce Batman's secret identity.[8]
But wikipedia says it's true, and it has citations. What do you have? D: