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.

My trial for REGICIDE.
Game of Thrones Season 4, Episode 4

What's the punishment for REGICIDE?
Game of Thrones Season 4, Episode 8

you stand accused by
the Queen Regent of REGICIDE.
Game of Thrones Season 4, Episode 6