What if you don't know American English?

Answer 1

There are some common rules for American English. * Where UK, Australian and NZ English often use the letter group of our, in American English the u is omitted. In the following examples, the first is UK English and the second is American English: favourite / favorite neighbour / neighbor colour / color * UK English uses an s where American English often substitutes a z. In the following examples, the first is UK English and the second is American English: capitalisation / capitalization recognise / recognize * In word building, UK English doubles the final consonant where it is preceded by a vowel, whereas American English does not. For example: traveller / traveler labelled / labeled * Some words which are spelt with a 'c' in the noun form but an 's' in the verb form of some words are not spelt with the 'c' in American English - both noun and verb forms retain the 's'. practice/practise in U.K. and Australian English is always practise in American English. licence/license is always license in American English.