any slang in ur native language that

makes it hard to learn?

lowk been bored asf waiting for the v0l0r0nt ch0mp00ns t00r games keke

probably all of it, slang doesn't make sense linguistically without cultural context

in my country (switzerland, not kazakhstan) there are 26 areas, similar to states in the US. and every single one has a different slang/accent so it's hard to understand every accent as a non-native speaker. swiss german is also not a written language so there's no dictionary or anything like that

in indonesia your cooked

As a mixed kid, I find it hard to understand any slangs in my mother's/father's native language

indo slangs doesn't make sense even for most indo.
they evolve each year because the gen z here is so dominant yet so dumb.

different regions of the UK have different slang and even in england alone accents change massively by counties in all directions. something like 140 across the whole of the UK but it differs depending on if youre doing it by ceremonial counties or administrative counties. huge debates on basic stuff like what you call the round loaf of bread to make a sandwich.