Normal to talk dirty about girlfriend's past in a foreign language?

New to this website and asking my first question:

I have a super hot German girlfriend and we have been together for 2 years now. We have consistently been having sex at least twice every day and everything is amazing. However, I have recently been talking really dirty stuff in her ears related to her past (she had 1 boyfriend before me) but I do it in a foreign language which she doesn"t understand. The things I say literally point to her not waiting for her man and being a slut (although she was never) and that she has to pay for getting fucked by another man before me by being my sex toy. I say these things only during sex and it just makes me even more horny and makes the sex more wild so she never cared to ask what it meant and I also think that it allows me to release the angst I have about her past.

Is it normal?