The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

Just the King in the North?
Game of Thrones Season 7, Episode 7

Stannis isn't from the North.
You are, Father.
Game of Thrones Season 5, Episode 8

The Starks will have dominion
over all lands NORTH of Moat Cailin,
Game of Thrones Season 2, Episode 5

The King in the North!
The King in the North!
Game of Thrones Season 1, Episode 10

What brings you so far NORTH?
Game of Thrones Season 4, Episode 1