The phrase 'when pigs fly' is a hyperbolic figure of speech used to describe an impossibility. It is often used for humorous effect and has numerous variations. Similar phrases in other languages include 'kun lehmät lentävät' in Finnish and 'See a tank rolling in here?' in Polish.

This article explains the difference between the words 'between' and 'among'. While 'between' is used for a one-to-one relationship, 'among' is used for a group or collectivity. However, 'between' can also be used for distinct individual items. The article also discusses the difference between 'between' and 'among' in terms of location or direction. Additionally, the article explains the difference between 'among' and 'amongst', with the latter being considered archaic and overly formal in American English.

The article discusses the use of the expression 'not exactly' in British English to express disagreement or criticism in a polite and understated manner. It highlights the importance of understanding this linguistic device to avoid cross-cultural misunderstandings. The article also touches upon the concept of politeness theory and how it influences language use.