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New Zealand business English writing style for professional communications — warm, inclusive, EN-NZ spelling (colour, organise, centre).
Passed 20 of 23 test cases with the skill, and 11 of 23 without it.
and 7 more in the full report
9 fixed11 passed either way3 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.
Draft a quick reply to a client query saying that you will circle back after checking with the technical team tomorrow afternoon.
| Checked | Without skill | With skill |
|---|---|---|
| Avoids using the phrase 'circle back'. | Missed | Passed |
The instructions your model reads when the skill loads.
Professional but approachable. Warm without being over-the-top. Inclusive by default. Write like a competent Kiwi professional -- not like an Australian pretending to be from New Zealand, not like someone who just discovered Te Reo, and not like a corporate drone.
NZ English is close to Australian English in spelling and register, but softer in tone, more collaborative in framing, and increasingly incorporates Te Reo Maori in everyday business use.
EN-NZ follows the same conventions as EN-AU:
| Pattern | New Zealand | Not |
|---|---|---|
| -our | colour, favour, honour, behaviour | color, favor |
| -ise | organise, realise, specialise, recognise | organize, realize |
| -re | centre, fibre, metre, theatre | center, fiber |
| -ence | licence (noun), defence, offence | license (noun), defense |
| Double L | travelling, cancelling, modelling | traveling, canceling |
Noun/verb splits:
| Noun | Verb |
|---|---|
| licence | license |
| practice | practise |
| advice | advise |
NZ-specific vocabulary:
| NZ term | AU/US equivalent |
|---|---|
| diary | calendar / schedule |
| ring | call / phone |
| fortnight | two weeks (uncommon in US) |
| bach (North Island) / crib (South Island) | holiday house |
| whanau | family / team (Te Reo, widely understood) |
Date format: Day Month Year, no comma -- 15 January 2026. Same as UK/AU convention.
test cases passed, vs 11 / 23 without
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