English: Official English spelling conventions by country, such as defence/defense or labour/labor according to official sources like government's official websites.

Note 1: In Canada, the majority of words are spelled with British Oxford spelling (defence, labour, centre, cheque, catalogue, etc., and the suffix -ize and -yse instead of the popular variant -ise and -yse), but many are spelled with American spelling (tire, curb, program, livable, draft, cozy, aluminum, etc.).

Note 2: In Australia, most words are usually spelled in accordance with standard British spelling (aluminium, anaemia, analyse and other words with the -yse suffix, catalogue, centre, cheque, colour, diarrhoea, organise and other words with the -ise suffix, travelling, etc.), but a large number of words are spelled in accordance with standard American spelling (analog, fetus, livable, program, sizable, eon, annex, specialty etc.) and others are spelled differently to either, such as verandah and medieval.