I wrote about Polari in the past, most notably here. In a nutshell, it was a rather complex slang used by British outcasts since the Nineteenth century, including gays before homosexuality was eventually ruled legal in 1967. Today it has almost completely disappeared, so imagine my marvel when I found out a short movie entirely spoken in Polari.
As a non-native English speaker it mostly sounds like turkeys clucking to me, but I’m pretty sure you will enjoy it as it is meant to.