“拿铁咖啡” 是caffè latte（意大利语）的音译，其中latte 是牛奶的意思。这个翻译也是够好笑啦。

下面是介绍caffè latte 的英文、中文文章。

A latte is a coffee drink made with espresso and steamed milk. The term as used in English is a shortened form of the Italian caffè latte, caffelatte or caffellatte, which means “milk coffee”. Wikipedia

这篇文章解释得不错：

咖啡知识普及（意式浓缩、美式、拿铁、卡布奇诺、摩卡、玛奇朵）出处：http://rongqiaodongqu.fang.com/3/bbs/2211093645~-1/640297509_640297509.htm