Thought of some others:
Aussies who say "You do the math" or make a statement and then say "period" as opposed to "full stop". You're not American, stop talking like you are. Or at the very least, just go over there and talk to the people who use words like 'bae' and 'woke' a lot...
People who, like, say the word like, in, like, every sentence...
People who preface general observations with "I'm not racist, but....". Seriously- have you ever met somebody who said "I'm a f**king racist prick and I think that....". Pointing out that the majority of cab drivers in Australia are Indian or Pakistani isn't racist. Noting that suburbs like Chatswood, Eastwood, Epping and Sunnybank are majorly populated by Chinese and Koreans isn't racist. Getting a sinking feeling when you call customer service and the person on the other end has an accent that makes them tricky to understand isn't racist, either.
People (like my parents when I was growing up) who would call a fart "Making a smell". How hoity toity can you get? I might have made a smell- people make a lot of smells- the smell of BO, the smell of their aftershave or perfume, the smell of their breath after they eat curry or stuff with lots of garlic in it. Did I pass gas? Did I rip one off? Now we're getting somewhere...
And last but not least- not a language one as such, but people who upwards inflect their voice at the end of every sentence? So they're, like, making, like, a statement, but the way they talk is like they're asking you a question? It seems to be especially popular with, like, hipsters? Maybe it's a side effect of being woke?