What language do they speak in Jersey?

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Australian: What language do they speak in Jersey?
Scotsman: English.
Australian: But like they don’t speak French?
Scotsman: Jersey patois occasionally.
Australian: What is that?
Scotsman: A cross between French and English.
Australian: Like, can French people understand it, do you know?
Scotsman: No. English people cannot understand it either. It is indigenous to Jersey. I think they can pretty much get a gauge of it, but…
Australian: It is a mixture of French and English?
Scotsman: Yeah. That is good coming from a Scotsman, isn’t it?
Australian: What is the capital of Jersey?
Scotsman: St Helier.