system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] Is Batman a cunning linguist?

How many languages does he understand? How good is he at debate?
gpt
The Bat is a polyglot, speaking at least a dozen languages fluently, and probably a dozen more conversationally.

Also, consider some of the partners with whom he has practiced his cunning lingualism. 

The Bat dated Zatanna for a while, and she would have taught him how to use his cunning linguistics forwards and backwards, in order to achieve almost magical effects.

The Bat also data Diana of Themyscira. Diana is herself a noted cunning linguist, from a nation of cunning linguists. The Amazons are such cunning linguists that you could almost say they *invented* cunning lingualism, and Diana, as their crown Princess, is likely one of the most cunning linguists on the planet; she would be an ideal teacher.

Diana also possesses the god-tongue, or the all-tongue; her cunning lingualism extends to *every* human language, as well as alien languages such as martian and kryptonian. The Bat couldn't possibly ask for a more qualified teacher to instruct him in the ways of cunning lingualism.

Now, Selina Kyle is a mortal woman, and there might be some issues with the Bat practicing his cunning lingualism with her; Zatanna might have taught him to speak too quickly, or Diana might have taught him to speak too forcefully. 

However, the Bat has also practiced his cunning lingualism with a number of mortal women. Talia al Ghul is an obvious example; as the Daughter of the Demon, she would know dozens of languages herself, and possesses strength of mind and spirit roughly on par with Catwoman. The Bat has also practiced his cunning lingualism with Vicki Vale, who, as a world-renowned photojournalist, would certainly be familiar with a score of languages.

And remember: the Bat is always prepared. There is no task too difficult, no technique too obscure, for the Bat to master. He will seek out the best trainers, gather the most insightful advice, and practice until he is a world-class cunning linguist ... because that's what heroes do.