I can enjoy both dirty talking in a foreign language, as well as in English - for me it's just a different thing (just like anal sex is not the same as vaginal sex even they're almost the same thing)
BUT - i can only enjoy foreign-language
if there are subtitles and the sad truth is that most porn producers don't bother to make subtitles because it's not cost-effective for them. Not enough people care to justify the effort/cost for them (i guess).
I guess this also the reason actors and actresses talk in English to begin with
I like English because the words spoken have a powerful effect on mind that's beyond just the simple "meaning" of what is being said. When they say: "I want you to fuck my ass" it triggers something different in my brain then if they said something like "Pu radabou gu lala moo" (made-up foreign sentence) and then I read some subtitle that said: "Me want you sex internal me butt" (I intentionally wrote this as invalid "English" to demonstrate the point).
I agree with you that if what a girl doesn't know English well, or doesn't feel comfortable using it freely, it can sound fake and "forced" if she says things she doesn't actually mean or utter spontaneously...
but actually a lot of girls in PW videos seem to speak English not bad at all, and i found some of their dirty talk extremely hot.
And in any case, if it's the choice between no dirty talk at all, and "lower quality" dirty talk, i'd still prefer some dirty talk - since it's still more engaging and humanizing than just moans and screams. When a girl (and a guy) just moans and screams it feels
too animalistic to me, like I'm watching a scene of two lions fucking in the zoo
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And ya - i am interested in such a category or tag for videos. I don't think so far I ever encountered a single porn producer that has this tag/category.