if
this listing from reddit is to believed and Finana can speak Hmong it's a bit more complicated than just "Chinese" since it's more of an ethnic minority that was chased out of China to Laos, then when the commies came to Laos and civil war began they fled as refugees to Thailand, Thailand eventually tried to kick them back to China and a great many refused to return fearing mistreatment, and eventually the US took them in. largely settling in California, Wisconsin, and Minnesota (Minnesota I believe being where Finana is from so the idea of one or more of her parents being a Hmong refugee that ended up in the US would check out)
That all being said I don't have verification that she speaks that language other than the reddit post mentioning it, perhaps her old identity spoke it on stream or mentioned it at some point.