I've rejected request for Wikipedia in "Chamuyet". They say it's the "real Cantonese". No article on Wikipedia with that name, ~160 hits on Google, request page on meta is the fifth. I would bet on trolling. I left the message to them to come back with ISO 639-3 code.
[1] https://meta.wikimedia.org/wiki/Requests_for_new_languages/Wikipedia_Chamyue...