Te reo Māori has been in contact with English for less than 200 years but has been spoken in Aotearoa (New Zealand) for centuries. How did a language in decline become a central part of Aotearoa's national identity?

Polari was a secret language used primarily by gay men in the UK up until about the 1970s. They were able to talk about sex and other topics in Polari without others understanding them. Given the strict anti-homosexuality laws in place at the time, this was a matter of great significance.

The remarkable story of an Australian language with only around 30 speakers remaining, showcasing a unique linguistic system on the brink of extinction and challenging our perceptions of how rapidly a language can transform.