In footage which I was not able to capture, recently, an American documentary presented an alphabet for teaching to children with a backward 'Z'. That is, the letter was like an 'S' with straight lines.
Was this a mistake or is the backward Z actually used in American English or American dialect ?
The only references I can find are a Stack Exchange question about representing a backward Z as a mathematical symbol and a Wikipedia article (citing no sources) which, tantalisingly, suggests it is part of the ancient Latin alphabet.
