:3==≈≈

As an Arabic speaker I have never heard of number 3, though Arabic is more like forty languages in a trench coat so that's not saying much.

Explanation for the french one : onion is an old slang for anus. So "mind your own onions" is an old-fashioned way to say "mind your own ass"

In Denmark, the youngsters have recently been saying "spurgt?" which translates to "asked?" - as in "were you asked?". Somehow the brevity and linguistic lazyness makes it even more infuriating.

That's not a common British expression, at least, perhaps someone says it.

Apparently the Argentine equivalent is something like “take your hat off, you’re not in this photo”

English also has, "stay in your lane."

Russian here. I've never heard this phrase in my life before. Maybe it's local, but definitely not common.

I've always been partial to "This is an A -- B conversation, so C your way out."

First time seeing this. Much more common one is "тебя ебать не должно" or a version without swearing: "не суй свой нос в чужие дела*

As native Russian speaker, this is terribly rarely used in this full format (and it's one among many), but genuine, I've heard it IRL.

"Тебя не ебёт, так не подмахивай"

This is highly and universally derogatory, you could expect to hear it from lowlife/criminal, which, unfortunately, is what most russians are lately, though. For russian nazi population, this implies that you are gay or a slut, depending on biological sex, and that's close to your life worth nothing. For the rest, this is just something nazies would say to insult you.

The first part alone, though, is quite socially acceptable and overused. I guess, because it's lost the whole lore behind it, and showing your knowledge of whence it came from kind of reveals that it's not just an empty word, but you mean it.

I'm a bit hyperfocused on swearing, am I? Was one of my childhood's special interests.

Honestly, "mind your beeswax" is also a rare gem, but not quite so rare.

In Taiwan it's “關你屁事“

Which is mildly translated to "Care about your fart situation"

This is pretty derogatory. I wouldn't use it unless it's with your friends messing around.

Qué te importa. Come torta. Con tu hermana la gordota.

Depends on the region. In my native it was popular to say ебало завали, which loosely translates into "collapse your mouth" where mouth is used in a sense where it's an organ for penetration during sex.

The Scouse British dialect has a nice term for this: "Geg out". As opposed to "Fred is gegging in", used when someone is trying to implicate themselves or become part of the group/conversation.
Someone involving themselves when they shouldn't be? Two syllables: Geg. Out.
No idea where it comes from but I heard it a lot in my youth. Forsomereason.

I will wiggle by ass on the camel & make signals with my candle whilst lubricating my onions with beeswax for you to fuck as I please, ok?!?!!

(Ireland) Wind yer neck in

Mexico very similar to chile : "no tienes vela en el entierro".. English: you do t have a candle in this burial".

Chilean Spanish? that's just a common Spanish saying

I'm from Chile and I have never heard of that one. But a lot of: y a voh, ¿quien te movió la jaula, culiao?