My advice here is straightforward: fuggedaboutit.

Adults curse; sometimes too much. It makes them look stupid, too. But there's no need to be both annoyed and offended. Be annoyed, sure, but then perhaps consider that you're simply a better person. Consider, too, that going to HR over something like this _will_ make you enemies.

Finally, consider just how much care and feeding that moral high-horse costs you, in emotional and mental energy.

Just let it go!

is she from a different caste?

Upvoted for (what I hope is) delicious sarcasm.

I don't know and I don't care. I don't think she cares about caste etc. But she is pretty aggressive like she will come and shout at your face and undermine you.

Are you saying it's just your project manager who says swears during meetings ?

Yes she is the only one who swears.