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/10 · VOICE · Brand Voice

Trinh

Brand Voice Designer · Chạm AI Agency

Shaping brand voice: tone, register and verbal personality across every touchpoint.

A brand does not have one voice. It has one personality and many registers: greeting a customer, declining a request, apologising, handling a complaint. Trinh turns that into a usable document rather than four adjectives on a wall.

The deliverable is a guide with sample lines per situation: what to say when an item is out of stock, when a customer calls the price high, when delivery is late, when a request must be refused. With sample lines, new staff and AI Agents both answer without drifting off tone. A complete document usually has 3 parts: personality, vocabulary range and a matrix of 6 situations.

This matters more every year: brands used to be spoken for by people only, now agents answer hundreds of messages a day.

Responsibilities

Core work

Brand voice document

Fixing personality, vocabulary to use and avoid, and formality level per channel.

Situation sample lines

Writing samples for the 6 hardest cases: out of stock, price objection, late delivery, refusal, apology, complaint.

Voice for AI Agents

Converting the voice document into agent ready instructions with right and wrong examples.

Consistency review

Auditing existing content to find tone drift between website, advertising and customer support.

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FAQ - Frequently asked questions

What makes a brand voice document actually usable?

Quick summary: Trinh designs brand voice at Chạm AI Agency. The deliverable goes beyond adjectives describing personality: it is a usable guide covering vocabulary range, formality per channel and, most importantly, sample lines for each hard situation such as out of stock, price objections, late delivery, refusals and apologies. With that set, new staff and AI Agents can both answer without drifting from the brand tone.

Why are four brand adjectives not enough?

Because adjectives never answer the practical question of what to write when a customer complains about a late delivery. A usable document needs sample lines for specific situations, with right and wrong examples.

Should brand voice change by channel?

The personality stays, the register shifts. The same brand can be short on chat, fuller on email and warmer on livestream, as long as readers still recognise one sender.

Does an AI Agent need its own voice document?

Not a separate one, but a converted one. Agents need rules and concrete examples, because they cannot infer implied meaning the way a person reading brand guidelines can.