Madagascar

The ariary is the currency of Madagascar. It is notionally subdivided into 5 iraimbilanja and is one of only two non-decimal currencies currently circulating (the other is the Mauritanian ouguiya).
The names ariary and iraimbilanja derive from the pre-colonial currency, with ariary (from the Spanish word “real”) being the name for a silver dollar. Iraimbilanja means literally “one iron weight” and was the name of an old coin worth 1⁄5 of an ariary. However, as of 2021 the unit is effectively obsolete, since one iraimbilanja is worth less than US$0.005 and the coins have fallen into disuse.