U.S. and UK English

We write in American English for customers in EMEA, LATAM, and certain APAC countries, as this is our brand standard for all communications.

However, communications directly from people in the UK, written for customers in the UK, or in former or current Commonwealth nations such as Brunei, Hong Kong, India, Ireland, Malaysia, New Zealand, Pakistan, Singapore, South Africa, and Sri Lanka, can use UK English spelling, grammar, and punctuation. Content types where UK English is acceptable in these markets include above-the-line advertising or an email from a UK-based support representative.

American English is the standard for all product copy, and developers should code in U.S. English.


Please refer to Merriam-Webster(opens external page) if you need to determine which form of a word or term you should use. Opt for the U.S. English version of the word or term to avoid misinterpretation.

The following tables highlight a few of the more common differences.

SuffixesAmerican EnglishBritish English
-ense and -encedefense, licensedefence, licence
-er and -recenter, metercentre, metre

-ize and -ise 

-yze and -yse

-ization and -isation




Exception: advertise




-og and -ogue catalog, dialogcatalogue, dialogue
-or and -ourcolor, favor, humorcolour, favour, humour

Single and double l plus -ed or -ingAmerican EnglishBritish English

Use a doubled l only in stressed syllables, such as excelled or controlling

canceled or modeling

Always use a double l: 

excelled, controlling, cancelled, modelling

Individual words with different U.S. and UK spellingAmerican EnglishBritish English

check (bank)cheque

forward, backward, toward

forwards, backwards, towards

fulfill, fulfilling, fulfillmentfulfil, fulfilling, fulfilment



In UK English, a collective noun (such as company, team, and group) takes a plural verb (The team are winning, not The team is winning.)


Punctuating large numbers or currency amounts can be tricky, because not all countries use commas and decimal points the same way. To see how numbers are presented around the world, please refer to this handy data visualization(opens external page)

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