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.

I prepared and passed
my exam for the Royal Mint in six weeks.
Money Heist Season 3, Episode 2

A vintage, MINT, in-box
The Big Bang Theory Season 12, Episode 24

She stayed back at the Royal Mint
Money Heist Season 3, Episode 2

Actually, she likes it better
than yours at the Royal Mint.
Money Heist Season 3, Episode 6

And my dad's on the roof skeet shooting
her Franklin Mint collectible plates.
The Big Bang Theory Season 3, Episode 7