any of the Old Spanish dialects during the Middle Ages; any of the southern European Romance languages during the Middle Ages in which the word for yes was si, particularly Italian dialects, by opposition to langue d'oc and langue d'oïl
working language (language that is given a unique legal status in an international organization or other supranational body as its primary means of communication); working language (language that a translator or interpreter works with)
red lantern; red lantern at the rear of a train; Lanterne rouge, the competitor in last place in a competition; the person or entity at the bottom of a ranking; Lanterne rouge, last place in a competition or other ranking