plus ça change
Concise Oxford English Dictionary © 2008 Oxford University Press:
plus ça change /ˌpluː sa ˈʃɒ̃ʒ/
▶exclamation used to express resigned acknowledgement of the fundamental immutability of things.
– origin Fr., from plus ça change, plus c'est la même chose ‘the more it changes, the more it stays the same’.
'plus ça change' also found in these Oxford entries:

