Personalised vs. Personalized: Which Spelling Should You Use?

Language is constantly evolving, and one of the most common battlegrounds for spelling differences is the transatlantic divide between British English (UK) and American English (US). If you have ever stared at a blinking cursor wondering whether to use an “s” or a “z”, you are not alone.

The debate between personalised and personalized comes down to regional preferences, historical spelling reforms, and your target audience. Let’s break down the rules so you can use the right spelling with confidence every time.

The Core Difference: S vs. Z

At first glance, the difference is minuscule:

• Personalised uses an “s” (UK, Australian, Indian, and South African English).
• Personalized uses a “z” (American and Canadian English).

Both words mean the same thing: designed or tailored to meet the specific requirements of an individual. Both function as adjectives or past-tense verbs derived from the noun person (via personal and personalise/personalize).