Not sure what English to use on the internet? Use American English.
When it comes to spelling color / colour or ton / tonne on the internet, American spelling dominates around the world. Research shows that 80% of the English spelling on the internet is American spelling.
In past years, English writing directed at a particular national audience would have deferred to that nation’s preferred way of spelling. “Recognize” would be used for US audiences and “recognise” for British, Canadian or Australian audiences.
But with the internet reaching audiences on all seven continents—and with more than half of all internet content written in English—tailoring websites or blogs to particular English-speaking groups is no longer practical. And so, in most cases, American English has become the default English of the internet.