Greek

Proverb

ο λύκος κι αν εγέρασε κι άσπρισε το μαλλί του, μήτε τη γνώμη άλλαξε, μήτε την κεφαλή του • ‎(o lýkos ki an egérase ki ásprise to mallí tou, míte ti gnómi állaxe, míte tin kefalí tou)

1. (pejorative) a leopard cannot change its spots (with specific reference to elderly people who, although they appear to have mellowed, are as bad as they always were)