The document landed Monday, forty-six pages, and page twenty-two was a table. Left column, We Say. Right column, We Don't Say. Forty rows of it. Warm not cozy. Confident not arrogant. Human not casual. I read the whole thing at Ovation with a coffee going cold next to me and could not have told you one true thing about how that brand actually sounds.
This is not a bad document. I have written this document. Probably eleven times.
A word list tells a writer which paint to use, and a voice tells them what the sentence is supposed to do to the person reading it.
Vocabulary is the easiest part of voice to specify and the smallest part of what voice is. Rhythm carries more. Sentence length carries more. What the brand is willing to admit carries most of it. Oatly does not sound like Oatly because someone approved the adjective playful. It sounds like Oatly because the carton argues with itself, apologizes for its own copywriter, and assumes you are in on the joke. Patagonia telling you not to buy the jacket was not a tone choice. It was a stance, and the tone fell out of it.
So three things I now put in the doc instead of the table.
One, a stance. Not adjectives, a position: what this brand believes that a reasonable competitor does not. Voice is an argument before it is a style.
Two, annotated real work. Take three paragraphs the brand actually shipped, put them on the page, and mark them up in the margin. This sentence works because it names a number. This one fails because it hedges twice before the verb. Writers learn voice the way anyone learns voice, by reading it with someone pointing.
Three, hard rules that can be broken and noticed. Never an exclamation point in a subject line. Never explain the joke. Never use a word the customer would not use out loud in a store. A rule you can violate is worth ten adjectives you cannot.
Then run the test that actually matters. Strip the logos off three paragraphs, yours and two competitors', and hand them to someone in the office who has never seen the guidelines. If they cannot pick yours, the vocabulary list did nothing, and no amount of warm-not-cozy is going to save the next campaign.
Voice is an argument before it is a style.
The host at my karaoke bar in Southeast calls everyone baby, tells you your song is going to be beautiful before you have sung a note, and has never once apologized for the sound system. I would know that man from one sentence on a page. Forty adjectives, and that brand book could not do the same.