c'è del marcio nel regno di danimarca significa in inglese

something is rotten in the state of Denmark▼(Hamlet quotation, used in other contexts to mean "something is not right")
phrase
[UK: ˈsʌm.θɪŋ ɪz ˈrɒt.n̩ ɪn ðə steɪt əv ˈden.mɑːk] [US: ˈsʌm.θɪŋ ˈɪz ˈrɑːt.n̩ ɪn ðə ˈsteɪt əv ˈden.ˌmɑːrk]