I’d personally go with the meaning of the word native. Meaning natural to you; from the environment you were born into, the culture you were born into, the language your parents and family speak. So probably Cantonese. But that doesn’t mean it has to be your primary language or even something you are good at now that you have moved into a different culture and language.
I mean, can you really put a patent on the idea of an astronaut suit for space soldiers? That seems way too generic.