My point plays on purpose on the ambiguity of the title, it's not specified what it means with language. As for syntax, I highly disagree too, it takes me a few

My point plays on purpose on the ambiguity of the title, it's not specified what it means with language. As for syntax, I highly disagree too, it takes me a few days to get that at most nowadays. Idioms, it takes longer (weeks), but knowing what to search makes a big difference in time. As for log, you shouldn't, assuming the reason for passing it around is testing. Go and Elixir use a similar idiom in that case where mocks aren't used, so in the case of a log library, the direct dependency with an option to disable logging in tests is preferable