Why American and British Spelling Are Different
At first glance, American and British spelling may look like simple variations of the same language. However, when we look more closely, these differences are deeply connected to history, pronunciation, and regional usage.
In general, American spelling tends to follow pronunciation more closely. In other words, many words in American English are written the way they sound. British spelling, on the other hand, often preserves older forms of the language, especially spellings that are closer to Middle English or even to the original Latin roots of words.
Because of this historical development, it is common to see spelling differences that may seem small but actually reflect very different linguistic paths.
Mum, Mom, Mam: Regional Differences in Family Words
One interesting example of this variation appears in words used for “mother.” While many people associate mum and mom strictly with British and American English, the reality is a bit more complex.
In some regions of England, particularly in parts of the West Midlands, the spelling mom and mommy has been used for a long time. These forms are not modern American inventions, but rather older English variants that were carried overseas during migration. Over time, these spellings became standard in American English.
As a result, in certain areas of the UK, especially around Birmingham and nearby regions, children may still learn and use mom and mommy, even though mum is more common in most of the country. In fact, local habits and school practices can strongly influence which spelling feels “natural” to speakers.
Meanwhile, in the North East of England, particularly in places like Tyne and Wear, another variation appears. There, many people traditionally use mam and mammy, both in speech and writing. This shows how regional identity continues to shape the English language within the UK itself.
What This Tells Us About English
Overall, these examples highlight an important point: English is not a single, fixed system. Instead, it is a living language shaped by history, migration, and local culture. Spelling differences between British and American English are not mistakes, but reflections of how the language evolved in different places.
Understanding these variations helps learners avoid confusion and appreciate why multiple forms can exist side by side — all of them correct in their own context.
| Spellings | |
| British English | American English |
| colour | color |
| humour | humor |
| favourite | favorite |
| theatre | theater |
| kilometre | kilometer |
| mum, mam or mom * | mom |
| cosy | cozy |
| realise | realize |
| dialogue | dialog |
| traveller | traveler |
| cheque | check |
| jewellery | jewelry |
| tyre | tire |
| British and American Vocabulary | |
| Clothes | Parts of a Car |
| At School | In and around the House |
| On the Road | People |
| Buildings / Shops | Sport |
| British and American Spellings | |
