Screening software compares text literally, so organise and organize are not automatically the same keyword. Which variants matter, and how to keep one document consistent.
Most CV advice treats spelling as a proofreading issue — get it right so you look careful. There is a second, less obvious reason to get it right when you are applying into the UK, Ireland, Australia, or New Zealand: keyword matching is literal, and organise and organize are different strings.
Applicant tracking systems rank applications partly by how well the text of your document overlaps with the text of the advert. The comparison happens on the words themselves.
Good systems normalise some of this. Stemming will usually collapse manage, manages, and managing into one root. Some platforms maintain synonym dictionaries. But transatlantic spelling variants are not reliably handled — they are neither inflections of the same stem nor conventional synonyms, and whether a given platform treats them as equivalent depends on the platform and how the employer configured it.
The three big platforms used across both markets — Workday, Greenhouse, and Lever — are all deployed by UK and Australian employers, and none of them publishes a guarantee that specialised will match a search for specialized. You cannot inspect the configuration from outside, which means you are guessing about something you can simply avoid guessing about.
The safe assumption: match the advert's spelling and the question never arises.
Most spelling differences never appear in a person specification. These do, constantly:
| British / Australian | American | Where it appears in adverts |
|---|---|---|
| organise, organised | organize, organized | Organisational skills, event delivery |
| specialise, specialised | specialize, specialized | Domain expertise |
| analyse, analysed | analyze, analyzed | Analytical roles, data |
| optimise, optimised | optimize, optimized | Performance, marketing, engineering |
| prioritise, prioritised | prioritize, prioritized | Workload and delivery |
| programme | program | Programme management, change delivery |
| centre | center | Contact centre, data centre, cost centre |
| licence (noun) | license | Driving licence, professional licence |
| fulfil, fulfilment | fulfill, fulfillment | Logistics, order fulfilment |
| behaviour, behavioural | behavior, behavioral | HR, psychology, research |
| liaise | (no US equivalent) | Stakeholder-facing roles |
Two of these deserve particular attention.
Programme vs program. In British English the two are not interchangeable. A programme is a planned series of activities — programme management, a training programme. A program is a computer program. Australian usage follows the British rule for the first sense but has drifted toward program in some government contexts. Read the advert and copy it.
Licence vs license. In British English licence is the noun and license is the verb. In American English license is both. If the advert asks for a driving licence, that is how to write it.
The -ise / -ize split is also less clean than it looks. Oxford spelling — used by Oxford University Press and some British academic publishers — prefers -ize in British English, which is why you will occasionally see organize in an otherwise thoroughly British document. This is legitimate but rare. The Oxford Learner's Dictionaries mark British and American variants on each entry if you need to check a specific word. For job applications, follow the advert rather than a house style.
Do not over-correct. These are the same in both:
-ise here is not the variable suffixTurning advertize into a word because you decided to be British is a worse error than the one you were avoiding.
A document mixing both conventions is the worst outcome. It reads as carelessly assembled — usually because someone pasted sections from an older CV written for a different market — and carelessness is exactly the trait a hiring manager extrapolates from.
Pick the convention the advert uses and apply it to the whole document, including:
Word processors default to whatever locale the machine was set up with, so set the proofing language explicitly rather than trusting it. A CV written on a US-configured laptop will quietly Americanise itself as you type.
Spelling is a small optimisation. It will not rescue a CV that does not evidence the essential criteria, and no employer has ever hired someone for their handling of -ise endings.
But it costs nothing, and it removes one avoidable way for a literal string match to miss. Fix it once per document, in the same pass where you tailor the CV to the advert, and then stop thinking about it.
If you want to see how a parser reads your current file before you send it, the free ATS checker will show you what it extracts and which of the advert's terms are missing.
Sources: Oxford Learner's Dictionaries, Workday, Greenhouse support, National Careers Service — CV sections.
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