Funny you should put it that way. When we have gone to Italy and South America, the spousal unit always gets a bit confused the first couple of days when I ask for his espresso and my "infusione" or "infusion" in the evening. I have to remind him that in most of the world, tea is black, green, or white tea. Herbal infusions are, in fact, not teas at all, but boiled infusions of other types of herbs (sometimes medicinal, sometimes aromatic), and are therefore not referred to as herbal "teas".