What?

In turkish it is called 20 yas disi meaning "20th year X."

In Arabic it is calles Ders-al-a'qel meaning "X of the mind."

In Korean Sa-rang-nee meaning "love X" referring to the young age and pain of the first love.

In Japanese its called Oyashirazu meaning "unknown to the parents" signifying the time a child moves away from its parents.

In Spanish it called muela de juicio meaning the "X of judgement".

In Thailand it is referred to as fan-khut meaning "huddling X" referring to shortage of place.

What am I talking about?

P.S. 100th post in this blog. Cheers!