Weird Question about Old Kung Fu Movies

generally, no live sound was recorded at all during filming. Hong Kong as an example, is a cramp noisy place, the studio backlot probably had another film being made around the corner. Add to that the amount of different languages and territories that these films were sold to, and it was just easier to do all dubbing later. Afterall, dialogue delivery didn't matter as much as action with these films. White characters may have been speaking English on set, but the dialogue may even have been rewritten as they go along, so it was kind of irrelevant to an extent

In Jackie Chans case for an example, he didnt speak his own dialogue to be heard in the scene, until Police story 3 in the early nineties.

The mans tongue didnt come through customs!

I don't understand your question; it would be more logical to assume all those white people were actually speaking in their own language.

And that was the case most of the time. English-language actors spoke English during shooting, Taiwanese actors spoke Taiwanese, etc... unless they were fluent in Chinese.

(If you're asking that why those English actors are dubbed in the *English dubbed version*, then no, it's not because they said their lines in Chinese.)