Quoting back a bit here but the way I was thought in school was that the -ize suffix is more appropriate whereas there are certain words that only the -ise suffix is correct. For example, I'd always spell Civilized with the -ize suffix and would likewise, never spell advertised with the -ize suffix.
How about we make this a three-way - English vs English vs 'That bloody language that was forced down our throats' aka English
The letter 'H' is pronounced as 'Aitch (A-itch)' in British English and American English, right? In Ireland, we pronounce it 'Haitch (Hey-itch)'. It's so ingrained in us that I was convinced for years it was the correct way to pronounce it until I was rightly set straight on our beloved Kotaku...
And here's the thread from the recesses of the web!
The thread also features a great Irish slang - Eejit. It's not a Gealic word but rather what our cursed tongues have done to the word idiot, though strangely enough we still say idiot quite well. One last one on the Irish front is 'craic' (pronounced crack). It means fun. So next time some Paddy comes up to you and asks if there's any craic around, chances are he's just looking for a good pub to rest his arse and not some drugs.
I didn't see Runners mentioned either, In the US, you'd call them sneakers. Also, there's chips and fries, crisps and chips and taps and faucets. Also, this may be more of an Irish thing than a British thing but over here we don't have a Prom when we're finishing school, we have Debs. Which reminds me, We don't have highschool, we have secondary school and we don't have grades, we have years.