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.

See that?
That's a Crawley's dung BEETLE.
The Big Bang Theory Season 3, Episode 2

the dung BEETLE also enjoys
The Big Bang Theory Season 7, Episode 1

standing on a beach made of BEETLE husks
Game of Thrones Season 4, Episode 8

or the reason behind
his relentless BEETLE slaughter.
Game of Thrones Season 4, Episode 8

Why be polite to the world's leading
expert on the dung BEETLE?
The Big Bang Theory Season 3, Episode 2