Snowy is a cross-breed Kneazle and cat who belongs to Arabella Figg. Snowy, like Mrs. Figg’s other cats, can understand human speech.
Harry was happy not to see photos of Snowy after Mrs. Figg broke her leg (PS2).
Snowy is part of Mrs. Figg's family, along with the rest of her cats.
Surveillance, can understand human language.
Other canon notes and references
Kneazles are described as intelligent and independent (FB).
Snowy was only one of Mrs. Figg's cats, the others being Mr. Tibbles, Mr. Paws, and Tufty.