"Đó không phải là khoai tây chiên."
Translation:Those are not french fries.
yes "to french", in cooking, now commonly refers to cutting any food into long thin strips. the French cut does come from France, as it used to mean to cut in the French manner. but the origins of this phrase comes from the late 19th century, so well after the term "French fried" was introduced. president Jefferson asked to be served "frying potatoes in the French manner" in the 1800s.