Chemical element meaning "no life") for "nitrogen". For purposes of international communication and trade, the official names of the chemical elements both ancient and more recently recognized are decided by the International Union of Pure and Applied Chemistry (IUPAC), which has decided on a sort of international English language, drawing on traditional English names even when an element's chemical symbol is based on a Latin or other traditional word, for example adopting "gold" rather than "aurum" as the name for the 79th element (Au). IUPAC prefers the British spellings "aluminium" and "caesium" over the U.S. spellings "aluminum" and "cesium", and the U.S.
Au pair for a residence permit for this purpose. Au pairing has long been a favored way for young women to learn French and, increasingly, for young men as well. The pocket money for au pairs in France is Euro 60 per week, plus, in most cases, a 20 euro a week contribution to language classes; in Paris families may also provide a carte Navigo (urban travel pass) which is worth 95 euros (approximately). Enrollment in a French language course is compulsory for non-European au pairs. While France does not have an official, government sponsored Au Pair Program, a number of established