Cait Sith is one of Final Fantasy 7's most-loved characters. He is a cat riding a giant stuffed toy Moogle (wait... Moguri!) who works as a fun-loving fortune-teller in the fabulous Gold Saucer location. The original PSone version of Final Fantasy 7 included unaccented Cait Sith dialogue. But it turns out Cait Sith is Scottish.
Cait Sith is in fact based on the Cat Sìth fairy creature from Celtic mythology. It's said to resemble a large black cat with a white spot on its breast, and haunts the Scottish Highlands.
Helpfully, a Scot who came across the Beacause project on the Qhimm forum offered to help Burke add a shot of Scotch to Cait Sith's dialogue. So, for example, instead of Cait Sith saying, "Oh damn,", he instead says, "Och!" "To" is now "Tae".
This change makes one section of Final Fantasy 7, considered for some time to be nonsensical, sensical. The original intention was that Reeve, the Shinra employee who uses Cait Sith to spy on Cloud's party, is the one with the Scottish accent. Reeve uses it when controlling poor Cait Sith to disguise the fact he's working for Shinra. While at Shinra, Reeve defaults to his normal accent, whatever that may be.