Norman: Spectacular innit.
Norman: Don’t say that, mate. You sound like your daughter.
Brian: OK. Well, it’s OK.
Norman: Now you’re speaking our language again.
Brian: We didn’t have music like that growing up in Oz, did we?
Norman: Yeah, we never danced, did we? Culture like that we never had.
Adopting the jargon of a different generation happens, but for a while it doesn’t ring true. But at least Brian used “awesome” appropriately, whatever we may think about its origins referring only to god-like epiphanies.
Beyond quibbles about lexical change, Brian and Norman are engaged in a serious debate on why Australians (and New Zealanders) leave their countries on culture-seeking OE missions. 150 years of European settlement in Australia and New Zealand isn’t very long to build a culture (Latin America has had 500 years). And the British, despite having a great literature, didn’t cook or dance that well.