Not consciously, most of them. Nobody abandons a quote form over a missing u. But it registers somewhere below the level of attention, in the same place that notices a shopfront sign starting to peel: a small signal that this business is not quite from here, or not quite paying attention.
For an Irish company selling to Irish customers, that is a strange thing to be signalling by accident.
It is almost never the writer
Here is the part most people get wrong. Americanisms on Irish websites are rarely typed by anyone. They arrive in the furniture.
A standard WordPress installation defaults to US English. Themes ship with US strings. Plugins ship with US strings. Your cookie banner, your search placeholder, your form validation messages, your checkout flow — all written by developers who were not thinking about Malahide.
We checked our own site while writing this. The copy was clean. But the consent plugin had been quietly printing “Privacy Preference Center” on every page of designminds.ie, and it had never once occurred to us to look, because we had only ever proofread the words we wrote ourselves. It is fixed now.
That is the lesson. Proofreading your copy is not the same as proofreading your website.
Where to look
Run through these before you worry about your prose:
- Cookie and consent banners. The single most common offender, and it appears on every page.
- Form labels and error messages. “Enter your zip code” on an Irish contact form is a small disaster.
- E-commerce flows. Checkout, shipping, order confirmation emails.
- Search placeholders and 404 pages. Nobody proofreads a 404 page.
- Automated email templates. Sent thousands of times, read by everyone, checked by nobody.
- Anything drafted with AI. Large language models default to American conventions unless told otherwise, and they are confident about it.
It is more than spelling
Spelling is the visible part. The conventions underneath it matter more.
- Dates. 03/04/2026 means the third of April here and the fourth of March in the United States. On a booking form or a delivery date, that is not a style question.
- Eircodes. Seven characters, a three-character routing key, then a space. A field labelled “ZIP” that rejects a space is a field that rejects Irish addresses.
- Phone numbers. +353 1 961 0034, with the leading zero dropped after the country code. Validation built for ten-digit US numbers fails on Irish ones.
- Floors. Our ground floor is the American first floor. Worth knowing before you print signage.
- Currency. The euro symbol goes before the figure: €1,200.
Where it actually costs money
Two places, in our experience.
Public sector and B2B tenders. Procurement documents in Ireland are written in Irish English. A submission that comes back in American English reads as a template that has been pointed at Ireland rather than written for it — and when you are being scored against firms that got the small things right, you do not want to be explaining the small things.
Trust in considered purchases. Nobody checks spelling before buying a coffee. People do read carefully before appointing a contractor, choosing a solicitor, or committing to a five-figure supplier. That is precisely where the friction lands.
The fix is smaller than you think
Set your site language to English (Ireland). Add a house style note — -ise not -ize, colour, centre, organise, programme — and give it to everyone who touches the site, including your developer. Then walk your own site as a customer would: fill in the form, trigger the error, reach the 404, complete a purchase, read the confirmation email.
You will find something. We did.
One last thing worth saying plainly: this is a copy and localisation job, not a rebrand. Changing spelling conventions does not require a new identity, and any agency telling you otherwise is selling you a bigger project than you need.