Register is the setting a brand writes in: formal or plain, close or distant, technical or everyday. A brand keeps one voice but shifts register between a product page, a launch post, and an apology, which is why register is recorded as its own part of a voice profile.
Why it matters
Voice and register get collapsed into one idea, and it costs you. Voice is the constant, the thing that makes writing recognizably one brand. Register is the dial that moves when the situation moves.
Get the voice right and the register wrong and the copy is technically on brand and still wrong for the moment: chatty in an outage note, stiff in a launch post, salesy in a reply to a customer who is already upset.
It is also the first thing a generic assistant flattens. Ask one for a rewrite and it hands back the same mid-formal, mid-warm setting it hands everybody, because that is the safe average of everything it read.
How Jinn treats it
Jinn records register among the voice signals, alongside cadence, convictions, and the words a brand refuses to use. It is read from published copy at every register the brand actually writes in, product pages, posts, packaging lines, rather than inferred from one sample.
Recording it separately is what lets a system move between situations without drifting. The voice holds steady, and the setting changes on purpose rather than by accident.
The voice group of the record holds cadence, convictions, banned words, and register. See it
Related terms
One voice, several settings.
Register is the dial, and it is recorded rather than guessed. See the voice signals the record holds.