Regional usage
GrammarVista.com USA: the American English guide
The checker on GrammarVista.com is set to American English by default. Here is exactly what changes between the two varieties, and what does not.
American and British English are the same language with a small set of predictable differences: some spellings, some everyday words, and a handful of grammar habits.
Neither is more correct. What matters is picking one and staying with it through a whole piece of writing.
Spelling: four endings that change
| Pattern | American | British |
|---|---|---|
| -or instead of -our | color, favor, honor, labor, neighbor | colour, favour, honour, labour, neighbour |
| -er instead of -re | center, theater, meter, fiber | centre, theatre, metre, fibre |
| Single l before an ending | traveled, canceled, modeling | travelled, cancelled, modelling |
| -og instead of -ogue | catalog, dialog, analog | catalogue, dialogue, analogue |
The -ize trap
Almost every list on the internet tells you that organize is American and organise is British. That is not quite true, and it is worth knowing.
Oxford style uses -ize in British writing as well, so organize is correct on both sides of the Atlantic. Plenty of British publishers, including Oxford University Press itself, prefer it. The reliable markers of American spelling are -or and -er, not -ize.
Everyday words that differ
| Meaning | American | British |
|---|---|---|
| Where you live | apartment | flat |
| Goes up in a building | elevator | lift |
| Large goods vehicle | truck | lorry |
| Season after summer | fall | autumn |
| Sweet baked snack | cookie | biscuit |
| Car fuel | gas | petrol |
| Time off work | vacation | holiday |
| Path beside a road | sidewalk | pavement |
| Rubbish container | trash can | bin |
One of these can genuinely confuse. In American English, pants means trousers. In British English it means underwear.
Grammar habits that differ
Groups of people
American English treats a team, a company or a government as one unit. British English often treats it as the members.
American: The team is winning.
British: The team are winning.
The past participle of "get"
American: He has gotten better.
British: He has got better.
Small words
- American: on the weekend. British: at the weekend.
- American: Monday through Friday. British: Monday to Friday.
- American: write to me, or write me. British: write to me.
Dates and punctuation
This one causes real confusion, because the same eight characters mean two different days.
American: August 25, 2026, written short as 8/25/2026.
British: 25 August 2026, written short as 25/08/2026.
03/04/2026 is 4 March in Britain and 3 April in America. When in doubt, write the month as a word.
Quotation marks differ too. American English puts the full stop inside: She said "yes." British English usually puts it outside: She said "yes".
What the checker does about this
The dictionary on GrammarVista.com holds both varieties, so neither color nor colour gets flagged as a mistake. That is deliberate. Marking a British writer wrong for organise would be teaching them something false.
Where the two varieties genuinely differ in grammar, both are shown and labelled rather than one being picked as the winner.
For the full documented list of spelling differences between the two varieties, see the reference list of American and British spelling differences.
Good to know
Questions people ask
Is American English or British English more correct?
Neither. They are two standard varieties of the same language. What matters is choosing one and staying consistent through a whole piece of writing.
Is organize American and organise British?
Not exactly. Oxford style uses -ize in British writing too, so organize is correct on both sides. The reliable American markers are the -or ending in color and the -er ending in center.
Does GrammarVista.com use American or British spelling?
American by default, but the dictionary holds both, so neither spelling is flagged as a mistake. Where the grammar genuinely differs, both are shown and labelled.
What does 03/04/2026 mean?
It depends on where it was written. In Britain it is 4 March. In America it is 3 April. When the reader could be either, write the month as a word.