In Italy we have “in culo ai lupi”, literally “up the wolves’ arses” and variants involving Satan’s or god’s respective asses depending on how blasphemous you’re feeling.

Also, in my area, the madeup town name is “Vergate sul Membro” a play on real town and river names that sound similar (Vergiate and the river Lambro) which translates to “rod strikes to the member” (i.e. penis).

In Lithuanian we have these:

• Dievo užmirštame kampelyje - In the little corner God forgot about (typically meaning a beautiful place)
• Giliame užkampyje - Somewhere deep, behind the corner
• Pasaulio pakrašty - At the end of the the world

Italian: “in culo al mondo”/“in culo ai lupi” (in the butt of the world/in the butt of wolves)

Since there’s surprisingly no Russian here yet, here are a few I know (some are probably regional):

• Где раки зимуют [Gde raki zimuyut] - “where crayfish spend their winter”
• У чёрта на куличиках [U chyorta na kulichikah] - “on the devil’s little Easter breads” (there’s also a version “on the devil’s horns”)
• За тридевять земель [Za tridevyat zemel] - “beyond threenine (i.e. 27) lands” feels somewhat fairytale/archaic, haven’t heard anyone use it unironically
• В жопе мира [V zhope mira] - “in the ass of the world”
• Зажопье [Zazhopye] - a made up placename roughly meaning “beyond ass”, evocative of many toponyms which start with the same prefix (e.g. Замосковоречье [Zamoskvorechye] - “beyond river Moscow”)
• Мухосранск [Mukhosransk] - made-up town name, roughly translatable as “where flies shit”
• Ухрюпинск [Ukhryupinsk] - corrupted name of the town of Uryupinsk, probably on account of it being far away from my birthplace
• Подзатворожинск [Podzatvorozhinsk] - made-up town name, roughly “[place which] started to turn into cottage cheese” or “under the [place] beyond cottage cheese” or some combination of the two

But honestly the most likely phrase I’d use in an informal context is a boring чёрт знает где [chyort znayet gde] - “devil knows where”

A Levant arabic way of saying it is “في طيز العقرب” which literally means “in the scorpions ass”

In English, I say that I’m in the middle of Bumfuck, Nowhere.

I guess we all have a tendency to envision anuses as being the middle of nowhere, even if we almost certainly love glutes.

In Hebrew, the closest we have is טיזינבי (tizinabi), which doesn’t mean anything in Hebrew but comes from Arabic طيز ٱلنَّبِي where it apparently means “the prophet’s butt”. TIL.

In New Zealand we say ‘in Waikikamukau’ (pronounced “Why kick a moo cow”) because it’s juuuuust enough like actual place names here that people don’t instantly pick up on the alternate meaning.

Meanwhile in Chile: “A la conchade su madre” (Literally: “Towards your mother’s c**t”)

In Québec we also use au milieu de nulle part. But abetter option is Saint-Glin-glin des meuh-meuh. Saint-ding-dong on the moo-moo.

I guess closest turkish version I ever seen used is “ebenin götünde,” which translates to “in your midwife’s butt.”

In South Africa, we say “halfpad tussen Pofadder en Putsonderwater”

Which translates to halfway between Pufadder (named after the snake) and well-without-water town.

Both are real places, with the stereotypical names that already play on the fact that there is very little going on there.

The open stretch between the two with no roads, no farms, no railways.

These days, it does not work in reality as their built the Square Kilometer Array there, as it was probably the quietest place (radio signal wise) in the world where you could build radio telescopes.

I find it funny that the title is “cultural differences”, but the content is actually showing how all these cultures needed someway to describe being in the middle of nowhere.

UK does have the idiom “bumfuck, nowhere” a fictional town in the fictional county of nowhere

In my hometown we usually say “a Puttemburgo” (literally “removedburg”) or “in culo ai lupi” (“up the wolves’ arsehole”) or “a Tron di Dio” (“on God’s throne”).