Personalised vs Personalized: Which Spelling Is Correct?

Personalised vs. Personalized: What’s the Real Difference?

Have you ever been typing an email or an essay, watched a red squiggly line pop up under a word, and wondered if you were spelling it completely wrong? When it comes to personalised and personalized, you aren’t actually making a spelling error—you’re just caught in the crossfire of a transatlantic spelling divide!

Both words mean the exact same thing: making or adapting something to meet an individual’s specific preferences or needs. The only difference is geography.

A Tale of Two Spellings

The split between these two words comes down to regional preferences:

• Personalised (with an s) is the standard spelling used in British English, Australian English, New Zealand English, and South African English.
• Personalized (with a z) is the standard spelling used in American English and is also widely accepted in Canadian English.

Quick Comparison Table

| Region / Dialect | Preferred Spelling | Example |
| :— | :— | :— |
| UK, Australia, New Zealand | Personalised | Her sneakers had a personalised design. |
| United States, Canada | Personalized | She received a personalized birthday card. |

Where Did the “-ise” vs. “-ize” Split Come From?

If you’ve ever wondered why American English favors the letter z while British English leans toward s, you can thank lexicographers (dictionary makers) of the past.

• The Greek Root: Many verbs ending in this sound come from Greek suffixes like -izo.
• The British Shift: Over centuries, British English spelling drifted toward using -ise (derived largely from French influences).
• The American Reform: When Noah Webster set out to create a distinct American dictionary in the early 19th century, he championed simplified, phonetic spellings. He strongly preferred the -z- spelling because it more closely reflects how the sound is actually pronounced.

As a result, words ending in -ise in the UK almost universally end in -ize in the US (think of words like organise/organize, recognise/recognize, and favouritise/favoritize).

Does It Matter Which One You Use?

Generally speaking, consistency is key.

1. Match Your Audience: If you are writing for a British or international school curriculum, a UK-based publication, or an Australian audience, stick with personalised. If you are writing for an American publication or submitting an essay to a US teacher, go with personalized.
2. Global Reach: If your content is read worldwide (like a global blog or social media post), either spelling will be instantly understood by your readers. Just try to pick one style and stick to it throughout your entire piece of writing!