The word "Fighting" to give encouragement

We Chinese people used to say "fighting" to give encouragement like "Good luck" or "Keep it up". I just talked with a foreigner he seems didn't understand what I said. So, is this word not commonly used or is it a correct word I using it?


I feel like "Hang in there" might be the closest English equivalent. As in "hang in there, keep fighting, don't give up".

hang in there - said as a way of telling someone to not give up, despite difficulties: Work can get tough in the middle of a term but hang in there and it'll be OK.

Hang in there - Cambridge Dictionary