linguistic:voice_change, linguistic:translation
Items used as currency

Packets of mackerel are another such item. In some prisons, packets of mackerel fish or "macks" has also taken prominence as a currency, as it is priced closely with one US Dollar, and maintains stability. In 2021, one "mack" was equal to about one dollar; by late 2023 the price had inflated to $1.30.