The Walloon language.

The Coptic language of Egypt.

(historical) languages spoken by the Allied Powers and borrowed words in Japanese that originated from such languages

(linguistics) "role language": unique language usage serving as a marker of social identity in fictional speech

(idiomatic, proverb) be quick on the uptake, understand the whole situation from just a few clues

“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds

New Tokyo International Airport (TYO), currently named Narita International Airport)

International Date Line (line on the Earth's surface)

the United Nations Children's Fund

the International Criminal Police Organization