old wine in a new bottle

Etymology
A reference to the parable of Jesus of, Matthew 9:14–17, Mark 2:21–22, and Luke 5:33–39.

Noun

 * 1)  An existing concept or institution offered as though it were a new one.

Usage notes
Often confused and used interchangeably with ; according to David Crystal, this could be explained by the fact that  was translated as  in the KJV, obscuring the original metaphor.

Translations

 * Arabic:
 * Chinese:
 * Mandarin: 新瓶裝舊酒
 * Danish:
 * Dutch: oude wijn in nieuwe flessen
 * Finnish: vanhaa viiniä uudessa pullossa
 * German: ; Altes in neuem Gewand; dasselbe in grün
 * Hungarian: régi bor új tömlőben,  régi bort új tömlőbe
 * Persian: ارایه ایده ای کهنه در لباسی نو
 * Polish: stare wino w nowych bukłakach
 * Russian: ста́рая пе́сня, да на но́вый лад, но́вое вино́ в ве́тхие ме́хи
 * Spanish: el mismo perro con distinto collar
 * Swedish: gammalt vin i en ny flaska