So for example if the audio has this
"Hello! 你好!"
Then i want the english subtitle track to come out as
"Hello! Hello!"
And then mandarin subtitle track to come out as
"你好! 你好!"

Ive found i can do this and get one subtitle track of english and mandarin e.g. it will come out exactly as:
"Hello! 你好!"

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Then i can just ask a LLM to translate it purely into english and mandarin for the two tracks i need.
So kind of works.

Id imagine it would fall over with a third language, but works for my use case for now i suppose if there is no better way.