Never underestimate the timeless wisdom of Albus Percival Wulfric Brian Dumbledore. At least, one British politician certainly didn’t seem able to get Dumbledore’s (and J.K. Rowling’s) sage ...

Parselmouths are very rare, ... Dumbledore learned Parseltongue to better understand Voldemort. Dumbledore learned Parseltongue, Mermish, and Gobbledegook because he's a badass.