In Middle English, cod meant "a bag or a sack", or by inference, "a scrotum", which is why the outrageous purse that sixteenth-century men wore at their crotch to give the appearance of enormous and decorative genitals was called a codpiece.

Typical of Iberia, both the Basques and the Catalans claim the word comes from their own languages, and the rest of Spain disagrees. Catalans have a myth that cod was the proud king of fish and was always speaking boastfully, which was an offence to God. "Va callar!" (Will you be quiet!), God told the cod in Catalan. Whatever the word's origin, in Spain lo que corta el bacalao, the person who cuts the salt cod, is a colloquialism for the person in charge.

The most highly developed salt cod cuisine in the world is that of the Spanish Basque provinces. Until the nineteenth century, salt cod was exclusively food for the poor, usually broken up in stews.

Where there are Norwegian communities, there are cod clubs.